Select the most appropriate option to substitute the highlighted segment in the given sentence. If there is no need to substitute it, select 'No substitution required'.
He won’t come to the party unless you will invite him personally.

Correct option is B

The correct substitution of the highlighted words is (b) invite.
Explanation: In conditional sentences with “unless”, we use present tense in the condition clause, not future.
Grammatical rule used:
• In first conditional sentences using “unless”, the structure is: Unless + simple present, future simple.
Example: Unless you hurry, you will miss the train.
Information Booster:
Incorrect: Unless you will tell me, I won’t know.
Correct: Unless you tell me, I won’t know.