Fill in the blank with the correct noun clause:
The organisers of the college fest are not sure ______.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → whether the guest singer will reach the venue in time
Noun clause with whether:
- A noun clause does the work of a noun. After “not sure”, it tells what the doubt is about.
- The doubt here has a yes-or-no answer: will the singer reach in time or not? So the clause begins with whether, and its words stay in statement order: subject “the guest singer” + verb “will reach”.
- Complete sentence: The organisers of the college fest are not sure whether the guest singer will reach the venue in time.
Why the Other Options are Incorrect?
Option 1: whether will the guest singer reach the venue in time — Incorrect. The option says “whether will the guest singer reach”. This is question order. Inside a noun clause the subject comes before the verb: “whether the guest singer will reach”.
Option 2: that the guest singer will reach the venue in time or not — Incorrect. “Or not” shows a choice between yes and no. Only “whether” can carry that choice. “That” gives a plain fact, so “that ... or not” does not fit together.
Option 3: whether the guest singer reaching the venue in time — Incorrect. “Reaching” is not a full verb. A clause needs a subject and a full verb such as “will reach”.