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, b, c, or d without using any additional words.
Options:
a. CN(C)C(=O)Nc1cccc(OC(F)(F)C(F)F)c1
b. O=C1C(=O)c2ncccc2-c2cccnc21
c. COC(=O)c1cc([N+](=O)[O-])ccc1Cl
d. CN(C)c1ccccc1CS(=O)c1nc2ccccc2[nH]1
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}