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 other words.
Options:
[a] CC(=O)OC(c1ccc(Cl)c(Cl)c1)C(Cl)(Cl)Cl
[b] c1nnc(NCNc2nncs2)s1
[c] N=C(Nc1c([N+](=O)[O-])cnc2ccccc12)N1CCOCC1
[d] Oc1c(Cl)c(Cl)c(Cl)c(Cl)c1Cl
[e] O=c1[nH]c(=O)n(C2CCCO2)cc1F
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}