Choose the correct phrasal verb to complete the sentence: The manager was _____ an explanation of his conduct.

Introduction / Context:
This question tests your understanding of phrasal verbs, especially those formed with the verb “call”. In office or official settings, particular phrasal verbs are used to describe formal actions, such as demanding an explanation. You must identify the correct phrasal verb that fits the meaning and structure of the sentence.

Given Data / Assumptions:

• The subject is “The manager”.
• The manager has to give an explanation of his conduct.
• The passive structure “was _____ an explanation” is used.
• The correct phrasal verb should indicate that an explanation was demanded or required.

Concept / Approach:
The phrase “to call for an explanation” means to demand or require an explanation. In passive form, “was called for an explanation” means someone officially required the manager to explain his behaviour. Other phrasal verbs with “call” such as “call off”, “call up”, and “call to” have completely different meanings and do not collocate with “an explanation” in this way.

Step-by-Step Solution:
Look at the structure: “was _____ an explanation of his conduct”.Option “called for”: “to be called for an explanation” is idiomatic and means being asked to explain.Option “called off”: means to cancel something (“The meeting was called off”).Option “called to”: usually needs a place or purpose (“called to the office”), not “an explanation”.Option “called up”: often refers to telephone calls or being summoned for military service.Therefore, only “called for” correctly completes the phrase.

Verification / Alternative check:
Insert the chosen phrasal verb into the sentence: “The manager was called for an explanation of his conduct.” This is a standard expression in formal English, especially in administrative and disciplinary contexts, and clearly indicates that he was asked to explain what he did.

Why Other Options Are Wrong:
“Called off” changes the meaning to “canceled”, which does not make sense with “an explanation”. “Called to” lacks the necessary object and does not pair naturally with “an explanation”. “Called up” would normally relate to a phone call or a summons, but not in the phrase “called up an explanation” in this structure. These uses are therefore inappropriate here.

Common Pitfalls:
Students often confuse phrasal verbs because the same base verb can form many different combinations with prepositions and adverbs. It is important to learn them in context and notice what kinds of objects they usually take. Remember that “call for an explanation” is the standard phrase used when someone is required to justify their actions.

Final Answer:
The correct phrasal verb is called for.