Step 1: Understanding the Concept:
The Tripitaka (Three Baskets) is the collection of primary Pali scriptures. Each "basket" serves a specific purpose in the preservation of the Buddha's teachings.
Step 2: Detailed Explanation:
1. Sutta Pitaka: Contains the discourses and sermons of the Buddha.
2. Vinaya Pitaka: Contains the code of discipline for monks (Bhikkhus) and nuns (Bhikkhunis). It includes the Patimokkha (list of 227/311 rules).
3. Abhidhamma Pitaka: Contains philosophical and psychological systematization of the teachings.
Step 3: Final Answer:
The Vinaya Pitaka is the section containing monastic rules.