Fill in the blank with the most appropriate word.
Jack's a policeman but he _____ a uniform.
A verb is used to express an occurrence, action, or state. It is the grammatical centre of the predicate in a sentence.
An auxiliary verb is a verb which gives is used in the formation of tenses, moods, tones, etc.
Option A is correct as the subject is singular and Jack is indicates the use of present simple tense . But indicates the need of not and does.
The other options are wrong as no other tense other than simple present can be used.
The correct answer is A)doesn't wear