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, d, or e without using any other words.
Options:
a: CCOP(=S)(OCC)Oc1cc2ccccc2oc1=O
b: O=[N+]([O-])N1CN([N+](=O)[O-])CN([N+](=O)[O-])C1
c: CCNc1nc(=O)nc(NC(C)(C)C(=O)O)[nH]1
d: CNC(=O)ON=C1CS(=O)CCS1
e: Cc1c(Cl)cc(-c2ccc(=O)[nH]n2)cc1Cl
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}