Which Buddhist council led to the division of Buddhism into Hinayana and Mahayana?

1. First Council
2. Second Council
3. Third Council
4. Fourth Council

Identify the odd one out among the reasons for the decline of Buddhism:

1. Corruption and luxury among Buddhist monks
2. Shift from Pali to Sanskrit for Buddhist texts
3. Revival of Hindu rituals and practises
4. Getting royal patronage

What are the Dwadashangi and why are they significant in Jainism?

Read the following excerpt and answer the question that follows:

"The Sutta Pitaka centres particularly on the basic principles of Buddhist thought and practise. And it, therefore, is the foundation for the study of Buddhist doctrine throughout the Theravada Buddhist world."

(Source: https://www.wisdom/ib.org/buddhism/essay/phi/osophy-of-/anguage-in-the-five-nikayas/d/doc1148277.htm/)

What is the focus of the Sutta Pitaka, and how does it contribute to Buddhist teachings?