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. CCCn1cnc2c1c(=O)n(CCCCC(C)=O)c(=O)n2C
b. CCOC(=O)c1ncn2c1CN(C)C(=O)c1cc(F)ccc1-2
c. CCOC(=O)C(c1c(O)c2ccccc2oc1=O)c1c(O)c2ccccc2oc1=O
d. CCCCc1ccc(O)c(C(=O)Nc2cccc(C(F)(F)F)c2)c1
Answer: c
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}