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, or c without using any additional words.
Options:
a: CCCC(=O)OCC
b: C[n+]1cc2c3c(ccc2c2ccc4cc5c(cc4c21)OCO5)OCO3
c: CCCC(=O)OC1(C(=O)COC(=O)CC)CCC2C3CCC4=CC(=O)CCC4(C)C3C(O)CC21C
Answer: a
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}