Major earthquakes are less likely to occur in

Earthquakes occur due to the disturbance tectonic plates of the earth. Major earthquakes are less likely to occur in Orissa. The most threatened areas in India are Kashmir, the Western and Central Himalayas, the whole of North-East, Rann of Kutch, Rajasthan, and the Indo-Gangetic Plain. Thus, major earthquakes are less likely to occur in Orissa.

Hence, the correct answer is "orissa".