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=C1NCN(c2ccccc2)C12CC[NH+](CCCC(c1ccc(F)cc1)c1ccc(F)cc1)CC2
[b] Fc1ccc(-n2cc(C3CC[NH2+]CC3)c3cc(Cl)ccc32)cc1
Answer: a
Task: Please answer the multiple choice question.
Question: Which molecules are {herg_blocker#not &NULL}a {herg_blocker__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_blocker%}
Answer: {%multiple_choice_result}