base system

The product of two numbers ‘231’ and ‘ABA’ is ‘BA4AA’ in a certain base system (where base is less than 10), where A and B are distinct digits. What is the base of that system? a. 5 b. 6 c. 7 d. 8 e. 4

The product of two numbers '231' and 'ABA' is 'BA4AA' in a certain base system (where base is less than 10), where A and B are distinct digits. What is the base of that system?

a. 5
b. 6
c. 7
d. 8
e. 4