Answer:
Option A. 1/2
is the correct answer.
Step-by-step explanation:
We are given with = 1/5
We want the result to be = 1/10
Let the fraction we want to know is X so
According to given condition:

Multiplying both sides by 5 we get:

As we know the cancellation property =

So By simplifying:

As 5 and 10 are multiples of 5 so they will be cancelled to give:

Hence when 1/5 will be multiplied by 1/2 the product is 1/10.
I hope it will satisfy you!