(7) Which of the following sentences is grammatically correct? *

A. Not only was the hydride moiety active toward the C-donor derivatives but also active toward the N donors.

B. The hydride moiety was active not only toward the C-donor derivatives but also toward the N donors.

C. The hydride moiety was not active only toward the C-donor derivatives but active toward the N donors.

D. Not only was the hydride moiety active toward the C-donor derivatives, but was also active toward the N donors.