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: CCN(CC)C(=O)c1ccc(OC)cc1O
b: CCCCOCCOC(=O)COc1cc(Cl)c(Cl)cc1Cl
c: O=c1[nH]c(=O)n(C2CC(O)C(CO)O2)cc1F
d: CCCCNC(=O)c1ccccc1
e: OCCOCCOCCN1CCN(C(c2ccccc2)c2ccc(Cl)cc2)CC1
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}