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. OCCCc1nc2n(n1)C(c1ccccc1)C=C(c1ccc(F)cc1)N2
b. CCn1cc(C(=O)NCC(C)C)c(=O)c2cc(F)c(N3CCN(C(=O)c4ccco4)CC3)cc21
c. COc1ccccc1N1CCN(C(=O)C(NS(=O)(=O)c2cccs2)c2ccccc2)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}