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 other words.
Options:
a: Cc1cc(=O)[nH]c(=O)[nH]1
b: O=C1C=CC(=O)N1c1ccc(Cl)cc1
c: CC(C)(CCl)c1cc(Cl)nnc1Cl
d: CCOCCOCCOC(C)Oc1ccc2c(c1)OCO2
Answer: d
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}