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 or b without using any other words.
Options:
(a) O=C1NC(=O)C(=Cc2ccc(N3CCN(C(=O)c4ccccc4)CC3)c([N+](=O)[O-])c2)C(=O)N1
(b) O=C(COC(=O)c1ccc(Cl)nc1)NNC(=O)c1ccc(Cl)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}