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’.
Nithi was not feeling well, yet she decide to go to work.

Correct option is B

The correct substitution of the highlighted words is (b) yet she decided to go to work.
Explanation:
· The main clause uses past tense (“was not feeling”). For tense consistency in a single past-time narrative, the coordinated clause should also be in the past simple (“ decided”), not base form “decide” or present perfect “have decided”.
· The coordinator yet correctly expresses contrast (“not feeling well” vs “still went”).
· The phrase is go to work (destination), not “go for work,” which is non-idiomatic in this context.
Grammatical rule used:
· Sequence of Tenses / Tense Consistency: When describing events in the past within the same time frame, maintain the simple past.
· Coordinating conjunctions: yet links two contrasting clauses of equal rank; each clause must be grammatically complete and tense-consistent.
Example:
“Rahul felt tired, yet he finished the assignment before midnight.”
Information booster / exceptions:
· Present perfect ( has/have decided) is used for past actions with present relevance, not for a closed past narrative with a definite time frame.
· Go to work = go to the workplace; go for work can mean “go out in search of work,” which changes the meaning and isn’t appropriate here.