In the history of Indian population, which duration period is referred to as 'A great leap forward'?

In the history of Indian population, which duration period is referred

1.	In the history of Indian population, which duration period is referred to as 'A great leap forward'?
A.	1921-1931
B.	1941-1951
C.	1951 - 1961
D.	1971-1981
Answer» B. 1941-1951