Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are not sure, you must pick either a or b without using any additional words.
Options:
(a) COc1ccc2c(c1)c(CC(=O)OCOC(=O)c1cccc(C)c1)c(C)n2C(=O)c1ccc(Cl)cc1
(b) CNC(=O)ON=C1CCCC1(C)C#N
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}