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) COC1=C(OC)C(=O)C(CCCCCCCCCCO)=C(C)C1=O
(b) CN(C)C(=O)Nc1ccc(Cl)c(Cl)c1
(c) Cc1cc([N+](=O)[O-])ccc1[N+](=O)[O-]
(d) C#CCOc1ccccc1OC(=O)NC
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}