Select the most appropriate option to fill in the blank.

______ is going to take the responsibility for this failure?

Who

The most appropriate option to fill in the blank is:

☀ Who

The sentence would read: "Who is going to take the responsibility for this failure?"

Explanation: The word "who" is used to ask about the identity of a person who will take responsibility for the failure. It's the correct pronoun for asking about a person. The other options don't fit the context:

• Whom: This pronoun is used in formal English as the object of a verb or preposition. It's not suitable for the subject position in this sentence.

• Which: This pronoun is used to ask about choices or options, not about a person's identity or responsibility.

• Whose: This pronoun is used to ask about possession or ownership, not about a person's responsibility for a failure.