Under review — part of this question (a structure or an option) is not clear in the source scan. 4AB is checking it against the original book; the answer shown may change.
Reaction of D - glucose with following reagents produces Reagents: 1. Acetone, $\mathrm{H}+;$ 2. $\mathrm{PDC} ; 3 (\mathrm{EtO})_{2} \mathrm{P}(\mathrm{O}) \mathrm{CH}_{2} \mathrm{CO}_{2} \mathrm{Et}, \mathrm{NaH}$
Answer
Under review — not yet confirmed.
SELF-PRACTICE — the source book printed no answer.
Nothing is invented here, so this question has no answer on record.