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 other words.
Options:
a: COc1ccc2c(c1)c(CC(=O)Oc1ccccc1C(=O)O)c(C)n2C(=O)c1ccc(Cl)cc1
b: N=C(N)NN=C1C=CC(=NNC(N)=S)C=C1
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}