Task: Answer the MCQ question.
Query: Which compound has a 12.889\% 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 COCCOC(=O)c1ccc(NC(=O)COc2ccc([N+](=O)[O-])cc2)cc1
b Clc1ncccc1-c1nc2ccccc2s1
c CCOc1ccc(Cl)cc1S(=O)(=O)n1cnc2ccccc21
Answer: b. Clc1ncccc1-c1nc2ccccc2s1
{#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#}
2-(2-chloropyridin-3-yl)-1,3-benzothiazole