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] CCCn1c(=O)c2c(ncn2CCCCC(C)O)n(C)c1=O
[b] CCOc1ccc(-c2ccccc2)cc1CN1CCCC1
[c] O=C1C2CC=CCC2C(=O)N1SC(Cl)(Cl)C(Cl)Cl
[d] Nc1nc(N)c2nc(-c3ccccc3)c(N)nc2n1
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}