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, or c without using any other words.
Options:
a.) O=[N+]([O-])OC1COC2C(O[N+](=O)[O-])COC12
b.) CCc1cc2c(s1)-n1c(C)nnc1CN=C2c1ccccc1Cl
c.) CCOC(=O)c1cnc2cc(OCC3CC3)c(OCC3CC3)cc2c1O
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}