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. CCN(CC)C(=O)CC(C)=O
b. COc1c2occc2cc2ccc(=O)oc12
c. C=CCC1=C(C)C(OC(=O)C2C(C=C(C)C)C2(C)C)CC1=O
d. CCC1(c2ccccc2)CCC(=O)NC1=O
Answer: d
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}