Task: Answer the multiple choice question.
Question: Which compound exhibits a 13.648\% hERG inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
(a) Cc1ccc(N2CC(C(=O)Nc3cccc(C(=O)NC4CC4)c3)CC2=O)cc1
(b) NC(N)=Nc1nc2ccc([N+](=O)[O-])cc2[nH]1
Answer: b. NC(N)=Nc1nc2ccc([N+](=O)[O-])cc2[nH]1
{#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#}
NC(N)=Nc1nc2ccc([N+](=O)[O-])cc2[nH]1
NC(N)=Nc1nc2ccc([N+](=O)[O-])cc2[nH]1
2-(6-nitro-1H-benzimidazol-2-yl)guanidine