WazirX is acquired by Binance since last year. Probably CZ wants to play safe in case India Government attack again the crypto exchange and froze there assets. There are reports before that this exchange bank account being frozen. India government is so persistent on taking down all business that involves crypto.
This is a bold move by CZ and it involves a lot of risk especially a panic by the public knowing there money is not really on the WazirX exchange.
I won't consider it the regular acquisition because Binance has always been with the project from launch and the reputation of the exchange was important in the launch of the project in India then when all laws was against cryptocurrency. The exchange exploit the population and the opportunity for P2P in India