Task: Answer the multiple choice question.
Question: Which compound has a 27.773\% human ether-à-go-go related gene (hERG) inhibition at 1uM?
Constraint: You must select none, one or more options from a, b, or c without using any additional words.
Options:
[a] NCCNc1ccc2nnnn2n1
[b] COc1ccc(N2CCN(c3ncnc4scc(-c5ccc(F)cc5)c34)CC2)cc1
[c] COc1ccc(-c2sc3ccc(OC)cc3c2C#Cc2ccccn2)cc1
Answer: a. NCCNc1ccc2nnnn2n1
{#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#}
NCCNc1ccc2nnnn2n1
NCCNc1ccc2nnnn2n1
N'-(tetrazolo[1,5-b]pyridazin-6-yl)ethane-1,2-diamine