Select the most appropriate article to fill in the blank.
Rabindranath Tagore, ________ poet, was famous for his poetical work, Gitanjali.

Correct option is D

The correct option to fill in the blank is (d) the.
We use "the" before singular, countable nouns when the person or thing is unique, well-known, or defined in the context.
Rabindranath Tagore is a specific and well-known poet.
Example: “Kalidasa, the great Sanskrit poet, is known for his work Meghaduta.”
Explain why other options are incorrect:
· (a) no article required – Incorrect, as an article is needed before a singular countable noun.
· (b) an – Incorrect, “an” is used before words beginning with vowel sounds. But here we need to show specificity, not sound.
· (c) a – Incorrect because “a” refers to any one among many, but here we’re referring to a specific, famous poet.