Ambubachi Mela is one of the biggest religious festivals of eastern India. With which state it belongs to?

The correct answer is option 3 , i.e Assam. Ambubachi Mela is an annual festival held for four days at Kamakhya temple , atop Nilachal hills of Guwahati, Assam on the bank of Brahmaputra river. Kamakhya Temple is one of the 51 shakti shrines representing the different body parts of Shiva's consort Sati. It is considered as one of the prime seats of Tantric cult.