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] COc1ccc(C)cc1Nc1c2c(nc3ccccc13)CCC2
[b] O=C(CSc1ccsc1[N+](=O)[O-])N1CCN(c2ccccc2)CC1
[c] Cc1c(CN2CCCCC2)c(O)n(CCO)c(=O)c1C#N
[d] Cc1c(C(=O)OC2CCCC2C)[nH]c2c1C(=O)CCC2
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}