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 other words.
Options:
(a) CNC1=Nc2ccc(Cl)cc2C(c2ccccc2)=[N+]([O-])C1
(b) CCC(COC(=O)CC(C)=O)(COC(=O)CC(C)=O)COC(=O)CC(C)=O
(c) CC=NN(C)C=O
(d) O=CC1=CCCCC1
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}