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, d, or e without using any additional words.
Options:
[a] CCN(CC)C(=S)NN=Cc1ccc([N+](=O)[O-])o1
[b] CC(C)(C#N)Nc1nc(Cl)nc(NC2CC2)n1
[c] COC(=O)C1(O)c2ccccc2-c2ccc(Cl)cc21
[d] COc1cc(C)c2[nH]c(C)c(CCN3CC4CCC(CC4)C3)c2c1
[e] CCCCCCCCCCCO
Answer: e
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}