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, c, d, or e without using any other words.
Options:
a.) CC(CO[N+](=O)[O-])O[N+](=O)[O-]
b.) CCOP(=O)(OCC)C(O)(C(F)F)C(F)F
c.) CC(C)N1C=CC(=C2C(=O)c3ccccc3C2=O)C=C1
d.) COP(=O)(OC)C(O)(C(F)F)C(F)F
e.) CC(C)C(Br)C(=O)OCC(Br)(Br)Br
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}