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 other words.
Options:
[a] CCOC(=O)C(SP(=O)(OC)SC)c1ccccc1
[b] CCOP(=S)(CC)Oc1ccc([N+](=O)[O-])cc1Cl
[c] CC(C)(C(N)=O)c1ccccc1
[d] COC(CN1CCN(CCC(O)c2ccccc2)CC1)c1ccccc1
Answer: d
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}