Which of the following statements about the Peer Kho Cave Temple is/are correct?

I. A historic cave temple located near Jammu city was constructed by the first Dogra ruler, Maharaja Gulab Singh.

II. The lingam is located inside a small cave embellished with a white marble rectangular platform.

III. The cave is also known as the Jamavant Guffa, as the bear hero of Ramayana is believed to have meditated in Guffa.