Task: Answer the MCQ question.
Query: Which compound has a 2.563\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
a. Clc1ccc(-c2nc3ccncc3[nH]2)cc1
b. Cn1cc(C(=O)N2CCN(C(=O)c3ccco3)CC2)c2c3ccccc3n(C)c2c1=O
Answer: a. Clc1ccc(-c2nc3ccncc3[nH]2)cc1
{#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#}
Clc1ccc(-c2nc3ccncc3[nH]2)cc1
Clc1ccc(-c2nc3ccncc3[nH]2)cc1
2-(4-chlorophenyl)-3H-imidazo[4,5-c]pyridine