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 other words.
Options:
a O=c1[nH]c(=O)n(C2CC(O)C(CO)O2)cc1Br
b CCOC(C1=NCC(C)(CC)CN1)c1cccc(Cl)c1
c CCOP(=S)(CC)Oc1ccc([N+](=O)[O-])c(C)c1
d CNC(=O)Oc1cc(C)c(N(C)C)c(C)c1
e CC(=O)c1cccc2ccccc12
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}