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, or c without using any additional words.
Options:
a. O=C1N=C(N2CCCCC2)SC1=C1CCCCC1
b. O=C(c1ccccc1)N1CCN(c2nc3ccc([N+](=O)[O-])cc3s2)CC1
c. COc1ccc(-c2cc3c(=O)n(CC(=O)Nc4cccc(Cl)c4)nc(C)n3n2)cc1
Answer: b
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}