Concept:
The Navāṅga Buddha-vacana refers to the nine-fold classification of the Buddha’s teachings. This system categorizes teachings according to literary style and method of presentation.
Step 1:
Listing the traditional order of Navāṅga.
• Sūtra
• Geya
• Vyākaraṇa
• Gāthā
• Udāna
• Itivṛttaka
• Jātaka
• Adbhutadharma
• Vaipulya/Vedalla
Step 2:
Matching the letters with positions.
• A = Sūtra
• E = Geya
• C = Vyākaraṇa
• B = Gāthā
• D = Udāna
Step 3:
Arranging the sequence.
Thus the order becomes:
\[
A \rightarrow E \rightarrow C \rightarrow B \rightarrow D
\]
Hence the correct sequence is:
\[
\boxed{A,\ E,\ C,\ B,\ D}
\]
Step 4:
Understanding the literary progression.
• Sūtra contains direct prose discourses.
• Geya combines prose and verse.
• Vyākaraṇa provides analytical explanation.
• Gāthā contains pure verses.
• Udāna contains inspired utterances.
This classification reflects the diversity of Buddhist literary expression.