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] Cc1ccc(C)c(C#N)c1
[b] CC(C)C(=O)N(C)C(=O)Oc1cccc(C(C)C)c1
[c] COP(=S)(OC)Oc1ccc(Cl)c([N+](=O)[O-])c1
[d] COc1c(OP(=O)(OCC(C)C)OCC(C)C)cnn(C)c1=O
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}