Select the most appropriate option that can substitute the highlighted segment in the given sentence. If there is no need to substitute it, select ‘No substitution required’.
Rahul shall write the exam at this time next week.

Correct option is D

The correct substitution of the highlighted segment is (d) shall be writing.
Explanation:
· The sentence talks about an action in progress at a specific time in the future → we use Future Continuous Tense.
· Structure: shall/will + be + V1+ing
Grammatical Rule Used:
· Use future continuous for ongoing actions at a specific point in future.
· Incorrect to use “shall write” (simple future) in this context.
Correct sentence: Rahul shall be writing the exam at this time next week. (correct)
Other options:
· (a) No substitution required – (incorrect)
· (b) will have been written – future perfect passive (incorrect tense)
· (c) would be writing – conditional tense (incorrect)