Problem statement: Answer the multiple-choice question.
Question: Which drug exhibits a -5.132\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, or c without using any other words.
Options:
a: C=CCN1C(=O)c2ccc(C(=O)N3CCN(S(=O)(=O)c4cccc([N+](=O)[O-])c4)CC3)cc2C1=O
b: O=C(NCCc1nc2ccccc2[nH]1)c1ccc(Cl)c([N+](=O)[O-])c1
c: Cc1ccc(Oc2ccc(NC(=O)C3=CC=CN4CCS(=O)(=O)N=C34)cc2)cc1
Answer: b. O=C(NCCc1nc2ccccc2[nH]1)c1ccc(Cl)c([N+](=O)[O-])c1
{#Task|Problem statement!}: Answer the {#multiple choice|multiple-choice|MCQ!} question.
{#Question|Query!}: Which {#compound|drug!} {#has|exhibits!} a {herg_central_at_1uM#}{herg_central_at_1uM__units} {herg_central_at_1uM__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_central_at_1uM%}
Answer: {%multiple_choice_result}. {SMILES#}
O=C(NCCc1nc2ccccc2[nH]1)c1ccc(Cl)c([N+](=O)[O-])c1
O=C(NCCc1nc2ccccc2[nH]1)c1ccc(Cl)c([N+](=O)[O-])c1
4-chloro-N-[2-(1H-benzimidazol-2-yl)ethyl]-3-nitrobenzamide