Fill in the blank in the given sentence by choosing the correct option: Mr.…

Concept

When a noun that names a unique post or office (one normally held by a single person at a time) is used as the complement of a linking verb such as become, be elected, be appointed or be made, the noun normally takes no article. The role itself, not one member of a set, is being named.

Applying it here

In "Mr. Sharma became ______ Principal of our school last year," the noun Principal is the complement of the linking verb became, and it names the single, unique office Mr. Sharma took up. By the rule above, the slot stays empty:

• “Mr. Sharma became Principal of our school last year.” (no article)

Compare the other forms

• Putting “a” or “an” before the title would treat the office as one of several interchangeable principals — which contradicts the single-holder meaning. “an” would also be wrong on sound grounds, since “Principal” begins with a consonant sound.

• Putting “the” before the title makes it a specifying phrase (“the Principal” as a thing being identified) rather than a role being assumed; after “became” the conventional, exam-standard form omits the article in this Subject + became + Title pattern.

So the blank is filled with no article: Mr. Sharma became Principal of our school last year.