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 additional words.
Options:
a: O=[N+]([O-])c1cccc(O)c1
b: Nc1ccc2c(S(=O)(=O)O)cc(S(=O)(=O)O)cc2c1
c: O=CC(Br)=Cc1ccccc1
d: Cc1cc(Cl)ccc1N=CN(C)C
e: Cc1cc(C)c(C)cc1C
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}