Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, or c without using any additional words.
Options:
(a) COP(=O)(N=C1SCC(C)S1)OC
(b) COc1cc(C(=O)N2CCCCCCC2)cc(OC)c1OC
(c) Clc1ccc2c(c1)C(N1CCNCC1)=Nc1ccccc1O2
Answer: a
Task: Please answer the multiple choice question.
Question: Which molecule has the highest {acute_toxicity__names__noun}?
Constraint: Even if you are {#uncertain|not sure!}, you must pick either {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%acute_toxicity%}
Answer: {%multiple_choice_result}