(A) wings, shaped so smoothly and perfectly
(B) wings, wings so smooth and so perfectly shaped
(C) wings that are shaped so smooth and perfect
(D) wings, shaped in such a smooth and perfect manner
(E) wings, wings having been shaped smoothly and perfectly so
Solution:
Pronouns
After coma, wings is required because pronoun them is present towards the end of the sentence.
For pronoun them a clear antecedent is needed. This antecedent will be wings which must be placed after coma.
Hence, A, C, and D are incorrect. Moreover in C, instead of adverbs (smoothly and perfectly) adjectives (smooth and perfect) have been used.
Furthermore in D, smooth and perfect manner mean smoothly and perfectly hence, D is wordier by one word than the sentence was required.
E is wordy.
B is the best choice.
Sentence Correction - 1000 Questions with Solution: