Task: Question Answering
Input (English): Question: Acid chlorides can be transformed into carboxylic acids: 
 Options:  <1> Through a hydrolysis catalyzed by an acid or a base. <2> Through a reduction reaction with lithium aluminum hydride. <3> Through a reduction reaction with sodium borohydride. <4> Through a reduction reaction with diborane. <5> It is not possible due to the lack of reactivity that characterizes acyl halides.
Output (English): 1