Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any other words.
Options:
a: COP(C)(=O)SC
b: CC(C)OC(=O)CCCCCCN
c: Cn1c(=O)n(-c2ccccc2)c2nc(Cl)ccc21
d: Clc1nc(C(Cl)(Cl)Cl)c(Cl)c(Cl)c1Cl
e: O=NN(Cc1ccccc1)Cc1ccccc1
Answer: b
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}