**(A)**

**(B)**

**(C)**

**(D)**

**(E)** None of the above

which is of the form .

We know that .

Therefore,

Hence, the answer is **(C)**.

**Remember that there are two other identities which are also very important:**

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by Jashan

**(A)**

**(B)**

**(C)**

**(D)**

**(E)** None of the above

which is of the form .

We know that .

Therefore,

Hence, the answer is **(C)**.

**Remember that there are two other identities which are also very important:**