Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a or b without using any other words.
Options:
a COc1ccc2c(c1)c(CC(=O)OCC(C(=O)O)c1ccccc1)c(C)n2C(=O)c1ccc(Cl)cc1
b Oc1ccc(-c2ccc(O)cc2)cc1
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}