Answer:
The correct option is 4. The value of given expression is 1.
Explanation:
The given expression is

In an expression, if the power of any number is 0, then the value of the expression is 1. It means

Where, x can be any number except 0.
In the given expression the power of whole expression is 0, therefore the value of expression is 1.
Thus the correct option is 4.