With respect to the two reactions shown below, the correct statements about their stereochemical nature is [LDA = Li(iPr2)]
1
The reactions are stereo selective, because P and Q are the same.
2
The reactions are non-stereo selective, because P and Q are the same.
3
The reactions are stereo selective, because P and Q are diastereomers
4
The reactions are enantioselective, because P and Q are enantiomers