Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any other words.
Options:
a: CC(C)C(Br)C(=O)OCC(Cl)(Cl)Cl
b: C=COCCOCCOC=C
c: CCCCN(CCC#N)CCCC
d: CCCC(C)(COC(N)=O)COC(=O)NC(C)C
e: Nc1nc(N)c2cc(N(Cc3ccc(Cl)c(Cl)c3)N=O)ccc2n1
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}