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, or d without using any other words.
Options:
a: COC(=O)C(C)N(C(=O)c1ccccc1)c1ccc(F)c(Cl)c1
b: S=C1NCCNC(=S)S1
c: O=C(CCCCC(=O)OC1CCCCC1)OC1CCCCC1
d: OC1(c2cccc(Cl)c2)c2ccccc2C2=NCCN21
Answer: c
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}