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) CCOC(=O)c1cnc2n(c1=O)C(C)CCC2
b) CC(C(=O)O)c1ccc(-c2cn3ccccc3n2)cc1
c) c1ccc(N(c2ccccc2)c2ccccc2)cc1
d) O=C1C(CCSc2ccccc2)C(=O)N(c2ccccc2)N1c1ccccc1
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}