Recently 'rain-loving' snake is discovered in which of the following Indian state?

A group of researchers have unearthed a new 'rain loving' snake species from Mizoram in North-east India. The researchers have named the specie "Smithophis Atemporalis". The species is reported to be a non-venomous kind and strictly aquatic. The maximum recorded size of the new species is about 655 mm or 2.5 feet. The discovery is a result of more than six years of collaboration between scientists from leading Indian and international institutes.