Sentence Correction - Verbal and Reasoning

Directions to SolveWhich of phrases given below each sentence should replace the phrase printed inboldtype to make the grammatically correct? If the sentence is correct as it is, mark 'E' as the answer.
Q1:

Most of the Indian workers are as healthy as, if not healthier than, British workers.

A as if healthy as not healthier

B healthier but not as healthy

C as healthy, if not healthier

D so healthy, if not healthier

E No correction required

ANS:E - No correction required

No answer description is available.