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, or d without using any additional words.
Options:
a. OCC1CCc2cc(C3CCCCC3)ccc21
b. O=[N+]([O-])OC1COC2C(O[N+](=O)[O-])COC12
c. Nc1ccc(Cc2ccc(N)c(Cl)c2)cc1Cl
d. O=C=Nc1ccc(Cc2ccc(N=C=O)cc2N=C=O)cc1
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}