The correct option is
A Explanation for the correct option.
Step 1. Assume two complex numbers.
Let and be two complex numbers.
The argument of is , and the argument of is .
The modulus of and is .
Step 2. Find the value of .
In the expression substitute and .
Step 3 Find the value of .
In the equation , substitute the values of , and .
Now square both sides.
Now, since and and it is found that .
So,
Thus the value of is .
Hence, the correct option is A.