Complete the sentence by using an appropriate phrasal verb:

A committee was set up to _________ the problem.

Look into

The correct answer is Option (2) - Look into

The sentence "A committee was set up to _________ the problem." suggests that the committee was formed to examine, investigate, or study the problem in detail.

The correct phrasal verb for investigating a problem is "look into".

Thus, the correct sentence is: "A committee was set up to look into the problem."

Meaning of the options:

 Look into → Investigate or examine (Correct)

• Example: The police are looking into the case.

 Look for → Search for something (Incorrect)

• Example: She is looking for her keys.

 Look after → Take care of someone or something (Incorrect)

• Example: She looks after her younger brother.

Look up → Search for information (Incorrect)

• Example: You should look up that word in the dictionary.