India has the smallest population of those under age 25?

India has more than 50% of its population below the age of 25 and more than 65% below the age of 35. It is expected that, in 2020, the average age of an Indian will be 29 years, compared to 37 for China and 48 for Japan; and, by 2030, India's dependency ratio should be just over 0.4.

look it up on google

bibliography and citations to credit the sources hope this you if not my deepest of apologize ^w^