Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any additional words.
Options:
a CCOP(=S)(OC)Oc1ccc([N+](=O)[O-])cc1
b CC(=O)CNC(C)(C)Cc1ccccc1
c COP(=S)(Oc1ccc([N+](=O)[O-])c(C)c1)OC(C)C
d NC(=O)Nc1ccccc1
e N#CCc1ccc(Cl)cc1
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}