Task: Answer the MCQ question.
Question: Which drug exhibits a 1.693\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
[a] OC(CNCCc1ccccc1)c1ccccc1
[b] Cc1ccccc1[N+](=O)[O-]
[c] COc1cccc(-n2c(-c3cccc(S(=O)(=O)N(C)C)c3)n[nH]c2=S)c1
[d] COc1cccc(C(=O)N(Cc2ccccc2)Cc2cc3cc4c(cc3[nH]c2=O)OCCO4)c1
Answer: b. Cc1ccccc1[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_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#}
Cc1ccccc1[N+](=O)[O-]
Cc1ccccc1[N+](=O)[O-]
6-methyl-1-nitrocyclohexa-1,3,5-triene