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, or d without using any other words.
Options:
a Nc1ccc([N+](=O)[O-])cc1[N+](=O)[O-]
b O=Nc1ccc(N=O)cc1
c COc1c(OP(=S)(OCC(C)C)OCC(C)C)cnn(C)c1=O
d CS(=O)(=O)c1ccc(O)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}