Task: Question Answering
Input (English): Question: In relation to clopidogrel, it is false that: 
 Options:  <1> It is structurally related to thienopyridines. <2> It inhibits adenyl cyclase, and therefore increases cAMP levels. <3> It has a low index of myelotoxicity in relation to ticlopidine. <4> It has a longer action in relation to ticlopidine. <5> In case of surgical intervention, it is recommended to interrupt the treatment at least one week in advance.
Output (English): 2