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 or b without using any additional words.
Options:
a CN(CCCn1cnc2c1c(=O)n(C)c(=O)n2C)c1ccccc1
b O=C(Nc1c(Cl)c(Cl)c(Cl)c2[nH]c(C(F)(F)F)nc12)c1ccccc1
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}