Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
[a] CCN(CC)C(=O)c1ccc(O)c(OC)c1
[b] C1CCC2CCCCC2C1
[c] O=C(O)Cc1c(Cl)ccc(Cl)c1Cl
[d] CCCCCCCCCCCCOC(=O)Cc1ccc(N(CCCl)CCCl)cc1
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}