Answer:

The correct answer is option 'C': "Is she going to play in a concert?"

Explanation:
To form a question in the present tense, we typically use the auxiliary verb "is" before the subject. In this case, the subject is "she." The verb "play" needs to be in the base form because it follows the auxiliary verb "is." Lastly, we use the preposition "to" before the verb "play" to indicate the purpose or intention of playing.

Therefore, the correct question form is: "Is she going to play in a concert?"

Let's break down the given options to understand why the other choices are incorrect:

a) "Is she play in a concert?"
This option is incorrect because it does not follow the correct sentence structure for forming a question in the present tense. The verb "play" should be in the base form, and the auxiliary verb "is" should come before the subject.

b) "She is going to play in a concert?"
This option is incorrect because it is a statement rather than a question. The word order is correct, but there is no question mark at the end to indicate that it is a question.

c) "Is she going to play in a concert?"
This option is correct because it follows the correct sentence structure for forming a question in the present tense. The auxiliary verb "is" comes before the subject "she," and the verb "play" is in the base form. The preposition "to" is used before the verb "play" to indicate the purpose or intention of playing. The question is also indicated by the question mark at the end.

d) None of these
This option is incorrect because option 'C' is the correct answer.

She is going to play in a concert