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