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. CN(c1nc2ccccc2s1)C1CCN(CCCCOc2ccc(F)cc2)CC1
b. CCOP(=O)(OCC)SCSP(=O)(OCC)OCC
c. CCCCCCCCCCCCCCCCCCO
d. CC1=Nc2ccc(Cl)cc2S(=O)(=O)N1
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}