Gautam Buddha attained enlightenment on the bank of which river?

Where did Gautama Buddha attain Nirvana (enlightenment)?

Who was the last person to get enlightenment from Gautam Buddha?

Who had attained enlightenment in Bodh Gaya?

Gautam Buddha gave the maximum sermons at which place?

Gautam Buddha attained “Mahaparinirvana” in kingdom of –