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, or d without using any other words.
Options:
a) Cc1cc(=NC(=O)c2ccccc2O)n(-c2ccccc2)n1C
b) c1cncc(C2=NCCC2)c1
c) CC(C)N1CCNCC1
d) CC(C)CN(CC(=O)NN=Cc1ccc([N+](=O)[O-])o1)CC(C)C
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}