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 additional words.
Options:
a O=C(CSc1ccccc1)N[C@@H](Cc1ccccc1)C(=O)O
b O=[N+]([O-])c1ccccc1Oc1ccc(S(=O)(=O)N2CCOCC2)cc1
c Cn1c(SCC(=O)NCc2ccccc2)nnc1-c1ccc(NC(=O)CCc2ccccc2)cc1
d CN(C)C(=O)c1ccc(OCC(F)(F)F)nc1
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}