Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any additional words.
Options:
[a] CCOC(C1=NCC(C)(C)CN1)c1cccc(Cl)c1
[b] CCOP(=S)(OCC)Oc1cc([N+](=O)[O-])c(Cl)cc1Cl
[c] COc1c(C(C)(C)C)cc([N+](=O)[O-])c(C)c1[N+](=O)[O-]
[d] CN1C(C(=O)Nc2ccccn2)=C(O)c2sccc2S1(=O)=O
[e] CCCCOC(=O)c1ccccc1O
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}