The Supreme Court on Monday sought the response of the Central government, the Election Commission of India and the States of Assam, Manipur, Nagaland and Arunachal Pradhesh on a public interest litigation petition seeking delimitation exercise to be carried out in the four States [Delimitation Demand Committee for the State of Arunachal Pradesh, Assam, Manipur and Nagaland in North East India vs Union of India and ors].