Concept:The first Buddhist council was convened immediately after Buddha’s death to preserve his teachings and monastic rules.
Explanation:The first Buddhist council was held in 483 BC at the Sattapanni caves in Rajagriha (modern Rajgir).
King Ajatashatru provided patronage for the council.
Monk Mahakasyapa presided over the meeting.
The main agenda was to compile the Buddha’s discourses (Sutta) and the monastic discipline (Vinaya).
Ananda recited the Suttas, and Upali recited the Vinaya, forming the Sutta Pitaka and Vinaya Pitaka.
The second council later took place at Vaishali, the third at Pataliputra, and the fourth in Kashmir.
Hence, the location of the first Buddhist council is clearly Rajagriha.
Answer:Rajagriha (Option A)