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, or c without using any additional words.
Options:
[a] CCNC(=O)CC(C)=O
[b] CC(C)(C)C(O)C(=Cc1ccc(Cl)cc1)n1cncn1
[c] Cc1ccc(SN(C)C(=O)Oc2cccc3c2OC(C)(C)C3)cc1
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}