Task: Please answer the multiple choice question.
Question: Which molecules are a hERG blocker?
Constraint: You must select none, one or more options from a, b, c, d, or e without using any additional words.
Options:
a: Br.CCCCCCCCCCCCn1ccc(=N)cc1
b: O=C(Nc1ccccc1)C1=C[C@@H](c2csc3ccccc23)C[C@@H](OCc2ccc(CO)cc2)O1
c: Cc1cccnc1NC(=O)CCn1c(=O)oc2ccccc21
d: Fc1ccc(-n2nnc(-c3ncc[nH]3)n2)cc1
e: CCNC(=S)N(Cc1cc2cc(C)c(C)cc2[nH]c1=O)C1CCCC1
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}