Amongst the given compounds MeCHO will undergo nucleophilic addition reaction while others will undergo nucleophilic acyl substitution. In acid derivatives the leaving groups are much better as compared to hydride ion or an alkide ion ( as required in case of aldehydes and ketones).

The order of reactivity of acid derivatives depends on 1) stability of resonance structure of acid derivative and 2) on the ability of the leaving group to depart.

Based on this the order of nucleophilic substitution is

RCOCl > RCO.O.COR > RCOOR > RCONH2