Give the symbol `SN^1, SN^2,E1`, and `E2` (more than one symbol may be used).
(a) Rates are same.
(b) Electrophilic catalysis is possible.
(c) With a given substrate some pairs of these may be concurrent.
(d) Rearrangement of the `R` skeleton may occur.
(e) `R1` reacts faster with `RC1`
(f) `R^(oplus)` are intermediates.
(g) With saturated `R^, s`, a Saytzeff product is always formed.
(h) Reactions are stereospecific.
(i) Reactions are concerted.
(j) Unhindered `1^@ RX` reacts with `NaOEt|EtOH`.
(k) `t-BuBr` reacts with `CH_3 COOH + CH_3 COO^(Ө) Na^(oplus)` (small).
(l) `t-BuBr` reacts with `CN^(Ө)`.
(m) `t-BuBr` reacts in `EtOH`.
(n) `2^@ RC1` reacts with `NaOEt|EtOH`.
(o) `2^@ RC1` reacts with `HCOOH` and has high dielectric constant.
(p) `2^@ RC1` reacts with `I^(Ө)` in acetone.
(q) `MeX` cannot react.

Explanation

(a) `E1, SN^1`
(b) `E1, SN^1`
(c) `SN^2` and `E2, SN^2` and `E1`
(d) `SN^1, E1`
( e) All
(f) `E1, SN^1`
(g) `E1, E2` (does with small base but not with bulky base)
(h) `SN^2, E2`
(i) `SN^2, E2`
(j) Mainly `SN^2`, little `E2`
(k) `SN^1, E1`
(l) `E2`
(m) `SN^1`, very little `E1`
(n) `E2, SN^2`
(o) `SN^1`
(p) `SN^2`
(q) `E1, E2. SN^1`.