Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, or c without using any additional words.
Options:
[a] CCCCc1c(C)[nH]c(NCC)nc1=O
[b] O=C1c2ccccc2C(=O)C1c1ccc(C(F)(F)F)cc1
[c] CCOC(=O)C1=CN(C(=O)OCC)C2CCCC(C)N2C1=O
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}