What module and operation will throw an error if a Mule events payload is not number ?

What module and operation will throw an error if a Mule events payload is not number ?
A . Filter modules Is Number operation
B . Validation modules Is Number operation
C . Validation modules Is not Number operation
D . None of these

Answer: B

Explanation:

Correct answer is Validation modules Is Number operation.

Mule 4 does not use filters anymore. The functionality provided by filters in Mule 3 can be achieved by using the Validation Module.