parijit
In addition to those specified for professions, the corporations maintained endowments in purely academic fields, especially in the physical sciences.
(A) the corporations maintained endowments in purely academic fields, especially in the physical sciences.
(B) the corporations had maintained purely academic endowments like those of the physical sciences.
(C) in purely academic fields, endowments, especially in the physical sciences, were maintained by the corporations.
(D) the endowments were maintained in purely academic fields, especially in the physical sciences, by the corporations.
(E) purely academic endowments, especially for those fields like the physical sciences, were maintained by the corporations.
Great question, here's my reasoning:
A) The start of the sentence is "In addition to those specified for professions,". What is "those" referring to? It can't be corporations, so it must be endowments. Hence A is incorrect since the first dependent clause is modifying the wrong noun.
B) In addition to what was said for A, the use of the past perfect here is wrong.
C) "In addition to X, in Y" is not legal grammatically. Even if it was, is "those" referring to academic fields? No it is not. This answer is incorrect.
D) CORRECT, it corrects the mistake made in A. The modifier is now correctly modifying the right noun.
E) What is "those" referring to in the subordinate clause in the middle of the sentence? It is vague hence this answer choice is incorrect.
Answer :D
One quick note to make: It seems like the use of passive voice is not absolutely wrong. D is using PV.