Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
a: Nc1ccc(F)cc1
b: CCc1cc(CC)cc(OC(=O)NC)c1
c: O=C(O)c1ccc2ccccc2c1
d: CC(C)COC(=O)c1ccccc1C(=O)OCC(C)C
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}