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 other words.
Options:
[a] C=C(Cl)C(OC(C)=O)OC(C)=O
[b] CC(=O)C=O
[c] O=C(OC1CCC(N2CCCCC2)CC1)C1CCCCC1
[d] COC12C(COC(N)=O)C3=C(C(=O)C(C)=C(N)C3=O)N1CC1C2N1C
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}