Answer:
Option 1 , 2 & 5
Explanation:
4 & 16 are perfect squares. So , 1/4 & 1/16 are also perfect squares. But 2 , 8 & 10 are not perfect squares. So root of 1/2 , 1/8 & 1/10 are irrational numbers.
Verification :-
1)

Hence , it is irrational.
2)

So , it is irrational.
3)

So , it is rational.
4)

So it is rational.
5)

Hence it is irrational.