Answer:

Step-by-step explanation:
If a be a real number,
Then the product of a and its multiplicative inverse is equal to the multiplicative identity, i.e. 1,
∵ 
Thus, the multiplicative inverse of a is 
By comparing it,
We found that,
The multiplicative inverse of
is 
i.e. 
The answer is d! The angle forms around the letter f therefore we need to make sure that the letter either remains in the middle or by itself. The only answer choice that does not match these options as E is in the middle is D. Hope this helped :)