Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any additional words.
Options:
a: FC(F)(F)c1nc2c(Br)c(Br)c(Br)cc2[nH]1
b: CC(C)(C)C(O)C(=Cc1ccc(Cl)cc1Cl)n1cncn1
c: NC(=O)NN=Cc1ccc([N+](=O)[O-])o1
d: O=NN(CCF)C(=O)NC1CCCCC1
e: CC(=O)CC(c1ccco1)c1c(O)c2ccccc2oc1=O
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}