Task: Please answer the multiple choice question.
Question: Which molecules are a human ether-à-go-go related gene (hERG) blocking compound?
Constraint: You must select none, one or more options from a, b, or c without using any additional words.
Options:
a.) COC(=O)Cn1c(=NC(=O)c2nc3ccccc3s2)sc2cc(S(C)(=O)=O)ccc21
b.) O=C(O)/C=C\c1cc2c(cc1[N+](=O)[O-])OCO2
c.) COCCCNC(=O)COc1ccc(S(=O)(=O)Nc2ccccc2)cc1
Answer: a
Task: Please answer the multiple choice question.
Question: Which molecules are {herg_inhib#not &NULL}a {herg_inhib__names__noun}?
Constraint: You must select none, one or more options from {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%herg_inhib%}
Answer: {%multiple_choice_result}