i took this exam too and i was so confused wth was going on, i thought i knew my orgo really well and i got a freakin 19 on the sample test, i was so pissed off!!
and i cant answer your questions bc i dont even understand # 97 or # 99 but for # 92, the answer is C because out of the carboxylic acid derivatives, amides are the least reactive so itd be hydrolyzed the slowest since its least reactive