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: CCCCn1c(C)cc(=NC(=O)c2ccccc2O)n1-c1ccccc1
b: C=CC(OC(C)=O)OC(C)=O
c: COc1ccc(-c2noc(CC(=O)O)c2-c2ccc(OC)cc2)cc1
d: O=COCCOC=O
e: CCOP(=O)(OC=C(Cl)Cl)OCC(Cl)CCl
Answer: e
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}