Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
a.) CCCCN
b.) CC(C)C(Br)C(=O)OCC(Br)(Br)Br
c.) O=P(O)(O)CN(CC(O)CN(CP(=O)(O)O)CP(=O)(O)O)CP(=O)(O)O
d.) O=C1C(Cl)C2(Cl)C3C(Cl)OC(Cl)C3C1(Cl)C2(Cl)Cl
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}