Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, or c without using any additional words.
Options:
a: CCCN(CCC)c1c([N+](=O)[O-])cc(C)cc1[N+](=O)[O-]
b: CN1CCN(C(=O)Cn2c(=O)sc3ccc(Cl)cc32)CC1
c: CCC(C(=O)O)c1ccc(CC(C)C)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}