Experts can you tell me the answer of this question 
In the present COVID-19 times, many economists have raised their concerns that
Indian economy may have to face a deflationary situation, due to reduced
economic activities in the country. So the Reserve Bank of India (RBI), cut Repo
Rate to the lowest in two decades. Also, it reduced the Cash Reserve Ratio (CRR)
maintained by the banks for the first time in over seven years. CRR for all banks
was cut by 100 basis points to release ₹ 1.37 lakh crores across the banking system.
RBI governor Dr. Shaktikanta Das predicted a big global recession and said India
will not be immune. It all depends how India responds to the situation. Aggregate
demand may weaken and ease core inflation.
QUESTION
In order to increase economic activities RBI wanted to increase the lending
power of commercial bank .To achieve this cash reserve ratio reduced to
......until march 21st 2021.
a) 3% b) 3.5 % c) 4.3% d) 3.5%