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: O=[N+]([O-])c1ccccc1
b: COP(=S)(Oc1cc(Cl)c(Br)cc1Cl)c1ccccc1
c: COC(=O)c1ccccc1OC
d: CCC(CC)C(=O)NC(=Cc1ccc(OC)cc1)C(=O)O
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}