Task: Please answer the multiple choice question.
Question: Which molecules are a human ether-à-go-go related gene (hERG) blocker?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
a: CCCCN(CC)S(=O)(=O)c1ccc(C(=O)N(CCCN(C)C)c2nc3cc(C)cc(C)c3s2)cc1.Cl
b: CCC/C=N/NC(=O)c1cc(Br)ccc1O
c: NC(=O)Nc1ccc([As](=O)(O)O)cc1
d: CCC(C)n1c(=S)[nH]c2c(sc3ccc([N+](=O)[O-])cc32)c1=O
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}