Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
a: Nc1cc(Cl)c([N+](=O)[O-])cc1Cl
b: O=C(O)c1cccc2c(Cl)ccc(C(=O)O)c12
c: Cc1cc([N+](=O)[O-])ccc1[N+](=O)[O-]
d: CN(C)C(=O)Nc1cccc(C(F)(F)F)c1
Answer: d
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}