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, d, or e without using any other words.
Options:
a. CCCCNCC1COc2cccc(OCC)c2O1
b. CCOCCOCCOC
c. O=C1CC(=O)N(c2ccccc2)N1c1ccccc1
d. CC(O)C(Cl)(Cl)Cl
e. CCOC(=O)NNc1nncc2ccccc12
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}