Which of the following statement is correct in the context of age structure in India?

Both 1 and 2

The correct answer is Option 3: Both 1 and 2

Option 1: The share of the under 15 age group in the total population has decreased between 1971 and 2011.: Correct

Option 2: The share of the 15–59 age group has increased in the total population between 1971 and 2011: Correct.

NCERT: "India has a very young population — that is, the majority of Indians tend to be young, and the average age is also less than that for most other countries. The share of the under 15 age group in the total population has come down from its highest level of 42% in 1971 to 29% in 2011. The share of the 15–59 age group has increased slightly from 53% to 63%, while the share of the 60+ age group is very small but it has begun to increase (from 5% to 7%) over the same period. But the age composition of the Indian population is expected to change significantly in the next two decades.