Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any additional words.
Options:
(a) CC=Cc1ccc(OP(=S)(OC)OC)c(OC)c1
(b) CCCc1ccc(O)c(OC)c1
(c) COP(=S)(OC)Oc1cc(Cl)c(Br)cc1Cl
(d) Nc1ccc([N+](=O)[O-])cc1
(e) COC(OC)c1ccccc1[N+](=O)[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}