Which of the following best defines ‘population ageing’ in a country?

Answer: [A] Increase in the median age of a country due to rising life expectancy

As per recent survey done by Longitudinal Ageing Study of India, half of India’s over 1.2 billion population is 25 years or younger, with only about nine per cent over 60 years and over the next three decades this is expected to balloon to 20 per cent or 340 million which is roughly the entire population of the United States.

This question is a part of GKToday's Integrated IAS General Studies Module