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: CC(C(=O)O)c1ccc(C2CCCCC2)cc1
b: Nc1ccc(C(=O)Nc2ccccc2N)cc1
c: Cc1nc([N+](=O)[O-])cn1-c1ccc([N+](=O)[O-])cc1
d: c1ccc(Nc2cccc3ccccc23)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}