Question

Choose the correct word or phrase that completes the sentence correctly.

The topic ____ is an important one.

• A. in discussion
• B. on discussion
• C. under discussion
• D. discussion

Answer 1

The correct option is C under discussion

Option C is the correct answer because the preposition 'under' is used to mean undergoing (a process) or in a state of. The phrase 'under discussion' means that something is being talked and discussed about.

Options A and B are incorrect because 'in' is to indicate a location and 'on' refers to a surface of something.

Option D is incorrect because without a preposition there is nothing to indicate the relationship of the noun 'discussion' to the rest of the sentence.