The correct answer is option 3- Quasi-Federal. A quasi-federal constitution is a combination of both unitary and federal features. In a unitary system, power is centralized at the national level, and provincial or regional governments have limited powers delegated to them by the central government. On the other hand, in a federal system, power is divided between the central government and regional governments, with each level having its own exclusive powers.

A quasi-federal constitution adopts elements from both systems. It devolves powers to regional or provincial governments, but the central government retains ultimate authority and can override the decisions made by the regional governments. This allows for a level of decentralization while maintaining the overall unity of the country. Quasi-federal constitutions are often found in countries with diverse regions that require some level of autonomy, but where the central government needs to maintain control to ensure national unity and stability.

It is important to note that while the term "quasi-federal" is commonly used, there is no universally defined standard for what constitutes a quasi-federal constitution. Therefore, the exact features and powers of a quasi-federal system can vary depending on the specific country and its constitutional arrangements.