What are the main 5 required Project Management Groups for any project?

The PMBOK mentions5 groups for the5 processes of the project management discipline

1. project Initiation group
2. project planning group
3. Project execution group
4. monitoring and control group
5. project closing group

All the best !

Just for spreading the word, I am listing here the details for group processes and their related knowledge areas as they were mentioned in the wikipedia:

http://en.wikipedia.org/wiki/A_Guide_to_the_Project_Management_Body_of_Knowledge

• The five process groups are:

1. Initiating : Those processes performed to define a new project or a new phase of an existing project by obtaining authorization to start the project or phase.
2. Planning : Those processes required to establish the scope of the project, refine the objectives, and define the course of action required to attain the objectives that the project was undertaken to achieve.
3. Executing : Those processes performed to complete the work defined in the project management plan to satisfy the project specifications
4. Monitoring and Controlling : Those processes required to track, review, and regulate the progress and performance of the project; identify any areas in which changes to the plan are required; and initiate the corresponding changes.
5. Closing : Those processes performed to finalize all activities across all Process Groups to formally close the project or phase.

• The ten knowledge areas are:

1. Project Integration Management : Project Integration Management includes the processes and activities needed to identify, define, combine, unify, and coordinate the various processes and project management activities within the Project Management Process Groups.
2. Project Scope Management : Project Scope Management includes the processes required to ensure that the project includes all the work required, and only the work required, to complete the project successfully.
3. Project Time Management : Project Time Management includes the processes required to manage the timely completion of the project.
4. Project Cost Management : Project Cost Management includes the processes involved in planning, estimating, budgeting, financing, funding, managing, and controlling costs so that the project can be completed within the approved budget.
5. Project Quality Management : Project Quality Management includes the processes and activities of the performing organization that determine quality policies, objectives, and responsibilities so that the project will satisfy the needs for which it was undertaken.
6. Project Human Resource Management : Project Human Resource Management includes the processes that organize, manage, and lead the project team.
7. Project Communications Management : Project Communications Management includes the processes that are required to ensure timely and appropriate planning, collection, creation, distribution, storage, retrieval, management, control, monitoring, and the ultimate disposition of project information.
8. Project Risk Management : Project Risk Management includes the processes of conducting risk management planning, identification, analysis, response planning, and controlling risk on a project.
9. Project Procurement Management : Project Procurement Management includes the processes necessary to purchase or acquire products, services, or results needed from outside the project team
10. Project Stakeholders Management : Project Stakeholder Management includes the processes required to identify all people or organizations impacted by the project, analyzing stakeholder expectations and impact on the project, and developing appropriate management strategies for effectively engaging stakeholders in project decisions and execution.

I agree with Mohammed Thiab's answer