Answer: The correct answer is option 4, i.e 1, 2 and 3. Neolithic sites found on North spurs of Vindhyas are considered as old as 5000 B.C but Neolithic settlements found in South India are not older than 2500 B.C and in some parts of southern and eastern India they are of as late as 1000 B.C. Hence, statement 1 is correct.