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, or d without using any other words.
Options:
a. CC(=O)OC1(C)CC(C)C(=O)C(C(O)CC2CC(=O)NC(=O)C2)C1
b. CC(=O)CC(c1ccc(Cl)cc1)c1c(O)c2ccccc2oc1=O
c. O=c1n(CCCN2CCN(c3cccc(Cl)c3)CC2)nc2ccccn12
d. CCCOC(=O)Nc1ccco1
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}