Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
a: O=[N+]([O-])c1cc[n+]([O-])cc1
b: CC(c1ccccc1)c1ccccc1CCl
c: O=C1CCc2cc(CCCN3CCN(c4ccccc4)CC3)ccc2N1
d: CN(C)CCCn1c2c(c3ccccc31)CCCCCC2
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}