Task: Answer the MCQ question.
Question: Which drug exhibits a 2.431% human ether-à-go-go related gene (hERG) inhibition at a concentration of 10uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
a: Brc1cccc(-c2nnco2)c1
b: COc1cccc(-n2nnc3c(=O)n(CC(=O)N4CCC(Cc5ccccc5)CC4)cnc32)c1
c: O=C(Oc1c(-c2ccccc2)oc2ccccc2c1=O)c1ccccc1
d: Cc1ccc(C(=O)C[n+]2ccc3ccccc3c2)cc1.[Br-]
Answer: a. Brc1cccc(-c2nnco2)c1
{#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#}
Brc1cccc(-c2nnco2)c1
Brc1cccc(-c2nnco2)c1
2-(3-bromophenyl)-1,3,4-oxadiazole