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, b, c, or d without using any other words.
Options:
a) Nc1c(Br)cc([N+](=O)[O-])cc1[N+](=O)[O-]
b) CC(COc1ccc(Cl)cc1Cl)C(=O)O
c) O=C1CCCCCO1
d) NC(=S)Nc1ccccc1Cl
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}