Task: Please answer the multiple choice question.
Question: Rank these molecules from lowest to highest acute oral toxicity (LD50 in rats).
Constraint: You must select all options from a, b, or c without using any other words.
Options:
(a) CN(N=O)c1ccccc1
(b) O=[N+]([O-])c1cc([N+](=O)[O-])c(O)c([N+](=O)[O-])c1
(c) CCOP(=S)(Oc1cnn(CC)c(=O)c1OC)OC(C)C
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}