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) O=C=NCCOC(=O)C1C2C=CC(C2)C1C(=O)OCCN=C=O
(b) CCNc1nc(Cl)nc(NC(C)CC)n1
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}