Two valence states of uranium, one with a deficit of four electrons and the other one with a deficit of six, occurs in nature and contributes to the diversity of uranium’s behavior.
(A) the other one with a deficit of six, occurs in nature and contributes
(B) the other one a deficit of six, occur in nature and contribute
(C) the other with a deficit of six, occurs in nature and contributes
(D) the other with a deficit of six, occur in nature and contribute
(E) one with six, occurs in nature and contributes
Solution (Posted on Jan 3rd):
One with X and the other with Y is the best construction (Parallel too). Occur - plural verb correctly used. D is right..!
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