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) O=C1CC(c2cccc(Br)c2)C(=O)N1
b) CNC(=O)Oc1cccc2c1OCCC2
c) CC(C)=NN=C(C)C
d) CCC(=O)OC1(c2ccccc2)CCN(C)C1C
e) CCCCCCOCCOC(=O)CCCCC(=O)OCCOCCCCCC
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}