77. Stereoisomers I and II undergo E2 elimination on treatment with sodium ethoxide in ethanol. One isomer reacts 500 times
faster than the other. Also, one isomer gives X as the only product, whereas the other gives Y together with some X.
Which of the following statements provides the best assignment of I and II? (A) II reacts faster and gives both Y and X (B) II reacts faster and gives only X
(C) I reacts faster and gives both Y and X (D) I reacts faster and gives only Y
(E) I reacts faster and gives only X
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