In the reaction 2-phenylacetic acid + ethanol in a H2SO4 solution yields Ethyl-2-phenylacetate, (a) which group in the acyl compound is being substituted and (b) what is the substituting group? a. (a) the carbonyl group of 2-phenylacetic acid (b) the hydroxyl group of ethanol b. (a) the hydroxyl group of ethanol (b) the carbonyl group of 2-phenylacetic acid c. (a) the hydroxyl group of 2-phenylacetic acid (b) the oxygen of ethanol d. (a) the hydroxyl group of ethanol (b) the oxygen of the hydroxyl group of 2-phenylacetic acid