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.) CCc1oc2ccccc2c1CC(=NCCN1CCOCC1)NO
b.) O=C(O)c1cc(O)c(O)c(OC(=O)c2cc(O)c(O)c(O)c2)c1
c.) CN(CCO)Cc1cc(C(=O)c2cccs2)cc(C(C)(C)C)c1O
d.) O=C=NCC1CCC(CN=C=O)CC1
e.) C[N+](=O)[O-]
Answer: e
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}