In ancient Indian Buddhist monastries, a ceremony called Pavarana used to be held, It was the

• A. occasion to elect the Sanghparinayaka and two speakers one on Dhamma and the other on Vinaya
• B. confession by monks of their offences committed during their stay in the monasteries during the rainy season
• C. ceremony of initiation of new person into the Buddhist Sangh in which the head is shoved and when yellow robes are offered
• D. gathering of Buddhist monks on the next days to the full moon day of Asadha when they take up a fixed abode for the next four months of rainy season