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 C=CCOc1ccc(CC(=O)O)cc1Cl
b CC(C)CCCCCc1ccc(O)cc1
c NC(=S)Nc1cccc(Cl)c1
d CCOP(=S)(CC)Oc1ccc([N+](=O)[O-])cc1Cl
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}