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 additional words.
Options:
a: Nc1cc(-c2ccncc2)c[nH]c1=O
b: N=C(N)NCCN1CCCCCCC1
c: CCCCCCCCCOC(=O)C1=CNC=C(C(=O)NC2CCCC2)C1c1ccccc1[N+](=O)[O-]
d: CC(C)(CCl)c1cc(Cl)nnc1Cl
e: O=NN(CCCC(F)(F)F)CCCC(F)(F)F
Answer: a
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}