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: CCOC(=O)c1cnc2n(c1=O)C(C)CCC2
b: CCN(CC)C(=O)c1cc(=O)c2ccccc2o1
c: O=C(OCC(O)C1COc2ccccc2O1)N1CCOCC1
d: CN(C)CCOc1ccc(C(=C(CCCl)c2ccccc2)c2ccccc2)cc1
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}