Task: Answer the multiple choice question.
Query: Which compound has a 1.929% hERG inhibition at a concentration of 10uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
(a) O=C(Nc1ccccc1)Nc1cc([N+](=O)[O-])ccc1F
(b) CS(=O)(=O)N(CC(=O)NC1CCCCCC1)Cc1ccc(Cl)cc1
Answer: a. O=C(Nc1ccccc1)Nc1cc([N+](=O)[O-])ccc1F
{#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#}
O=C(Nc1ccccc1)Nc1cc([N+](=O)[O-])ccc1F
O=C(Nc1ccccc1)Nc1cc([N+](=O)[O-])ccc1F
1-(2-fluoro-5-nitrophenyl)-3-phenylurea