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.) CC(C)=CCC(CCN(C)C)(C(N)=O)c1cccc2ccccc12
b.) CCOP(=S)(OCC)SCc1nnc(OC)s1
c.) CCOP(=S)(OCC)OC(=CCl)c1ccc(Cl)cc1Cl
d.) O=C(O)c1cc2ccccc2cc1O
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}