Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
a) O=C1OC(=O)C2CC(Cl)=CCC12
b) OC(c1ccc(Cl)cc1)(c1cncnc1)c1ccccc1Cl
c) CN1CCN(CCC(=O)NN=Cc2ccc([N+](=O)[O-])o2)CC1
d) CCN1CN1CC
Answer: a
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}