Salman Khan . . . . . . . . a part of the upcoming Race 4.

Correct Answer: Option A: will also be

Explanation:
In English grammar, the placement of adverbs is important for maintaining proper syntax and clarity. In this sentence, the adverb "also" modifies the verb phrase "will be," indicating that Salman Khan will be participating in the upcoming Race 4 in addition to something else. The correct placement of "also" is before the main verb "will be." Therefore, Option A: will also be is the correct choice.

Options B and C are incorrect because they place "also" between "will" and "be," disrupting the correct word order.
Option D is incorrect because it only places "also" after "will," which also disrupts the correct word order.