Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a: CC(C)C1NC(=O)c2ccccc2O1
b: CN(CCCN)CCCN
c: CCCOC(=O)c1ccc(C(=O)OCCC)nc1
d: O=C1CN2CCOC2(c2ccccc2F)c2cc(Br)ccc2N1
Answer: b
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}