Question

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

This was the topic of discussion where he had touched ____ this problem.

• A. to
• B. with
• C. upon
• D. in

Answer 1

The correct option is C upon

A phrasal verb consists of a verb with a preposition or an adverb or both, the meaning of which is different from the meaning of its separate parts. For example, 'work out' does not mean to work outside rather it means to exercise.

Option C is the correct answer because the preposition 'upon' when used with the verb 'touched' forms the phrasal verb 'touched upon' which means to mention a subject quickly when speaking or writing about another subject.

Options A, B and D are incorrect because none of these prepositions can be used to form the correct phrasal verb with the word 'touch' and thus would be grammatically incorrect if used in the given sentence.