I hope this helps you
x^6.1/8
x^3/4
4Vx^3
(4.square root of x^3)
Answer:
Can't guess whether you have written 'x' or you have put a sign of multiplication!!
Consider expression 
1. Use property

Then

2. Use property

Then

3. Use property

Then

4. Use property

Then

Answer: correct option is B.