Which country in South Asia is the largest population?

Which country in South Asia is the largest population?

جنوبی ایشیا میں سب سے زیادہ آبادی والا ملک کون سا ہے؟
Explanation

The most populous country in South Asia is India.

With a population of over 1.3 billion people,

India is not only the most populous country in South Asia

China second most populous country in the world, after India.