Option A: -24 is the coefficient of i
Step-by-step explanation:
The expression is

To determine the coefficient of i, first we shall find the square of the binomial for the expression

The formula to find the square of the binomial for this expression is given by

where
and

Substituting this value and expanding, we get,

Simplifying the terms, we have,

Thus, from the above expression the coefficient of i is determined as -24.
Hence, Option A is the correct answer.