NO LESS AN X THAN Y

Yes, there is an idiom in English- no less an x than y.

For e.g. no less a superstar than Rajni Kant.

Q. No less an expert than John H. McWhorter has claimed that African-American children do poorly in schools because of implicit social pressure to fail academically.

A. Same.
B. Not less an expert
C. Not less an expert
D. Not less an expert than
E. An expert not less than

Correct choice is A as per the idiom.