Task: Please answer the multiple choice question.
Question: Rank these molecules from lowest to highest acute oral toxicity rat LD50.
Constraint: You must select all options from a or b without using any additional words.
Options:
a CCN(CC)CCN
b O=C1NC(=O)C2C3C(C(O)(c4ccccc4)c4ccccn4)=CC(C3=C(c3ccccc3)c3ccccn3)C12
Answer: a
Task: Please answer the multiple choice question.
Question: Rank these molecules from lowest to highest {acute_toxicity__names__noun}.
Constraint: You must select all options from {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%acute_toxicity%}
Answer: {%multiple_choice_result}