Task: Answer the multiple-choice question.
Query: Which compound exhibits a 4.900% hERG inhibition at 10uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
[a] CCONC(=O)Nc1ccccc1[N+](=O)[O-]
[b] O=c1cc(N2CCN(c3cccc(Cl)c3)CC2)[nH]c(=O)n1C1CCCCC1
Answer: a. CCONC(=O)Nc1ccccc1[N+](=O)[O-]
{#Task|Problem statement!}: Answer the {#multiple choice|multiple-choice|MCQ!} question.
{#Question|Query!}: Which {#compound|drug!} {#has|exhibits!} a {herg_central_at_10uM#}{herg_central_at_10uM__units} {herg_central_at_10uM__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_10uM%}
Answer: {%multiple_choice_result}. {SMILES#}
CCONC(=O)Nc1ccccc1[N+](=O)[O-]
CCONC(=O)Nc1ccccc1[N+](=O)[O-]
1-ethoxy-3-(2-nitrophenyl)urea