Explanation
Why Correct: The first Buddhist Council was held at Rajagriha (Rajgir) in 483 BCE, shortly after the Mahaparinirvana of the Buddha, under the patronage of King Ajatashatru of Magadha. The council was presided over by Mahakasyapa (Mahakassapa), a senior disciple of the Buddha, who convened the gathering to compile the Buddha's teachings.
Distractor Analysis: Upali was the disciple who recited the Vinaya Pitaka (rules of monastic discipline) at the first council, but he did not preside over it. Ananda, the Buddha's personal attendant, recited the Sutta Pitaka (discourses) at the same council, but he was not the presiding figure. Moggaliputta Tissa presided over the third Buddhist Council, held at Pataliputra in 250 BCE under Emperor Ashoka's patronage, not the first council.
Takeaway: The first Buddhist Council at Rajagriha compiled the Vinaya Pitaka (recited by Upali) and the Sutta Pitaka (recited by Ananda), while the Abhidhamma Pitaka was added at the third council. The second council was held at Vaishali in 383 BCE under Sabakami, and the fourth council was held at Kundalvana, Kashmir, in 72 CE under Vasumitra and Ashvaghosha.