Step 1: About Suttapiṭaka.
The Suttapiṭaka is the second division of the Pali Canon and consists of Buddha’s discourses. Step 2: Order of Nikāyas.
Traditionally, the order is: Dīghanikāya → Majjhimanikāya → Aṅguttaranikāya → Saṃyuttanikāya → Khuddakanikāya. Step 3: Analysis.
Given the options, the correct sequence matches (B), (C), (D), (E), (A). Step 4: Conclusion.
Thus, the correct answer is (2) (B), (C), (D), (E), (A).