The correct answer is: D. no article
Harivansh Rai Bachchan is often called the "second Shakespeare" because of his mastery of the English language and his ability to write poetry and plays that are both beautiful and profound. However, he is not literally the second Shakespeare, as Shakespeare was a 16th-century English playwright and poet, while Bachchan was a 20th-century Indian poet and writer.
The other options are incorrect because they all imply that Bachchan is literally the second Shakespeare. Option A, "a," implies that Bachchan is one of many people who could be called the second Shakespeare. Option B, "an," implies that Bachchan is the only person who could be called the second Shakespeare. Option C, "the," implies that Bachchan is the only person who has ever been called the second Shakespeare.
In conclusion, the correct answer is: D. no article
