MCQ
Incorrect statement


- ✓$A$ & $B$ are diastereoisomers with respect to each other
- B$A$ & $B$ are chain isomers
- C$S_N2$ rate $A > B$
- D$S_N1$ rate $A > B$

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$P = [Ne]\, 3s^23p^3$
$Q = [Ar]\,3d^{10}4s^24p^3$
$R = [He]\,2s^22p^5$
$S = [Ne]\,3s^1$
Incorrect statements is