The correct answer is: B. is
Kaushikbhai is a singular noun, so the verb must agree with it in number. The verb “is” is the singular present tense form of the verb “to be.” It is used to describe a state of being or to identify someone or something.
The other options are incorrect because they are not in the singular present tense. The verb “am” is the first person singular present tense form of the verb “to be.” It is used to describe the speaker or writer. The verb “are” is the second person singular and plural present tense form of the verb “to be.” It is used to address the listener or reader. The verb “were” is the past tense form of the verb “to be.” It is used to describe a state of being or to identify someone or something in the past.
In this case, we are describing Kaushikbhai’s current state of being, so we need to use the present tense verb “is.”