To which religion/sect Ashoka granted Barabar caves situated in Bihar?

In which one of the following states are the Guntupalle Buddhist Caves located?

Which among the following state 'Odantipur' Education Centre was situated?

Which of the following Buddhist sacred place is situated on the Bank of River Niranjana?

Which Buddhist council was not held in Bihar?

Which one of the following inscriptions of Ashoka confirms the tradition that Gautama Buddha was born in Lumbini?