Solution:The First Council was held by king Ajatashatru with the monk Mahakasyapa Upali at Rajagirha.The Second Council was held by king Kalashoka with Sabakami at Vaishali.
The Third Council was held by Ashoka with monk Moggaliputta Tissa at Pataliputra.
The Fourth Council was held by king Kanishka with the monks Ashvaghosha and Vasumitra at Kundalavana in Kashmir.
