Rajasuyarambha is the twenty-second upa parva included in the second Maha parva named Sabha parva in the epic Mahabharata. Various compilations of this epic are numbered differently and this one upa parva may be numbered in a different fashion. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

After the departure of Narada Rishi, Yudhishtira had thought of Rajasuya yaga.

The proposal for conducting Rajasuya by Yudhishtira was known to Draupadi and she verified the royal treasury in their palace.

Lokapala sabha is the twenty-first upa parva or the second upa parva under the second maha parva in Mahabharata. Mantra parva or Sabhakhyana is another name for this upa parva. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

What were the instructions received from the learned scholars to Yudhishtira?

The learned scholars instructed Yudhishtira to start for the performance of the Rajasuya yaga. He was presiding in the meeting and asked various experts regarding Rajasuya yaga and received their assurances for the successful conduction of the same. 

What were the details of kings narrated by Krishna to Yudhishtira?

Sabhabhavana is the twentieth Upa parva, and the first upa parva of the second Maha parva, named Sabha parva, in the epic Mahabharata. Sabhakriya is another name for this upa parva. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

What were the instructions given to Maya, the architect of demons, by Krishna?

Since Arjuna had saved Maya from a fire mishap during the Khandava vana dahana, Maya wished to offer some services to Arjuna but Arjuna directed him to speak with Krishna. Then, Krishna had given special instruction to the demon architect Maya to construct a meeting hall for Yudhishtira.

What did Yudhishtira do to Maya?

Khandavadahana Parva is the nineteenth Upa Parva in the first Maha Parva named Adi Parva, in the epic Mahabharata. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

What are the other names for this Upa Parva?

This Upa Parva has many names like Khandavadaha, Arjuna’s Indraprastha Dahana, Sarangopakhyana Agnikanda etc.

Why was Khandavadahana necessitated?

Subhadravivaha Parva is the eighteenth upa parva included in the first maha parva, named as Adi parva, in Mahabharata. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

How Krishna appreciated Arjuna as the most suitable bridegroom for Subhadra?

Krishna wanted to convince Balarama and his father Vasudeva regarding the marriage of Subhadra with Arjuna. Initially, Balarama was thinking to select either Duryodhana or Bhima, since both of them had learned mace fight under Balarama. Krishna started to tell about the various special capabilities of Arjuna. Krishna had performed penance with Arjuna at Prabhasa. Both of them had attended the festival at Raivata Mountain together. God Shiva had been pleased to bless Arjuna and when Krishna told the facts, Balarama was convinced.

Rajyalabha Parva is the fifteenth upa parva included in the first maha parva, namely the Adi parva in Mahabharata. Vyshampayana had narrated the historic events to Janamejaya, on his queries:

What did Pandavas do after Vidura had visited Panchala?

Pandavas discussed with Krishna and asked permission of Drupada to go to Hastinapur and to accompany Kunti and Draupadi with them.

Who was the main witness for the farewell of Pandavas from Panchala?

Viduragama Parva is the fourteenth upa parva in the first maha parva, named as Adi parva, in Mahabharata. Vyshampayana had narrated the historic events to Janamejaya, on his queries:

How the news of Pandavas’ marriage with Draupadi reached Hastinapura?

Vaivahika Parva is the thirteenth upa parva in the first maha parva, named as Adi parva, in the epic Mahabharata. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

What was the opinion of King Drupada regarding his son in laws?

King Drupada was very happy to know about his sons in laws. He wished to give away his daughter in marriage to Pandavas. When Drupada learnt that the successful people of swayamvara were the Pandavas, he felt extremely happy. He decided to conduct a feast to the guests of swayamvara with the Pandavas and sent through his priest, an invition to Pandavas for attending the feast.

Who was the priest for Draupadi swayamvara?