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 additional words.
Options:
a Nc1ccc(Cl)c([N+](=O)[O-])c1
b CC(C)(N=C=O)c1cccc(C(C)(C)N=C=O)c1
c CNC(=O)Oc1ccc(N=CN(C)C)c(C)c1
d CCOC(C1=NCC(C)CN1)c1ccc(Cl)cc1
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}