Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a or b without using any additional words.
Options:
a O=C(Nc1c(Cl)c(Cl)c(Cl)c2[nH]c(C(F)(F)F)nc12)c1ccccc1
b CCc1cc2c(s1)-n1c(C)nnc1CN=C2c1ccccc1Cl
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}