Citric acid may be changed into tricarballylic acid in two steps. A промежmediate, $Q$, is produced. Which reagents are required for each step?
- Astage 1: concentrated $\text{H}_2\text{SO}_4$; stage 2: $\text{H}_2(\text{g})$ and Ni
- Bstage 1: concentrated $\text{H}_2\text{SO}_4$; stage 2: $\text{LiAlH}_4$
- Cstage 1: $\text{LiAlH}_4$; stage 2: $\text{H}_2\text{SO}_4(\text{aq})$
- Dstage 1: $\text{NaOH}(\text{aq})$; stage 2: $\text{H}_2(\text{g})$ and Ni