The correct option is A Simran, 3600 million
We know that 1 billion = 1000 million.
Simran has 4 billion = 1000×4
= 4000 million
Given, Sonali has 400 million
∴ Simran has more money.
Amount of money that Simran has more than Sonali = 4000 - 400
= 3600 million