Introduction:
The Constitution of India is a comprehensive document that outlines the fundamental principles, rights, and duties of the citizens of India. It also distributes powers between the Union (central government) and the states. One important aspect of the Constitution is the division of legislative powers between the Union List, State List, and Concurrent List.

Explanation:
The Union List, State List, and Concurrent List are three separate lists that categorize various subjects and specify which level of government has the authority to make laws on those subjects. The Union List includes subjects on which only the central government can legislate, such as defense, foreign affairs, and atomic energy. The State List includes subjects on which only the state governments can legislate, such as police, public health, and agriculture. The Concurrent List includes subjects on which both the central and state governments can legislate, such as criminal law, marriage, and divorce.

Public Order:
Public Order is an important subject that concerns the maintenance of law and order, prevention of crime, and protection of public safety and tranquility. It involves the regulation of activities that could potentially disrupt public peace and harmony. The power to legislate on matters related to public order is vested primarily in the state governments. Hence, Public Order is included in the State List of the Indian Constitution.

Importance of Public Order:
Public Order is crucial for the smooth functioning of society and the protection of individual rights and freedoms. It ensures that citizens can live peacefully and without fear of violence or disruption. Public Order laws cover various aspects, including the prevention and control of riots, maintenance of public safety, regulation of assemblies and processions, and management of law enforcement agencies.

Residuary Powers:
Residuary Powers refer to subjects that are not explicitly mentioned in any of the three lists - Union List, State List, or Concurrent List. These powers are vested in the central government. However, Public Order is not included in the Residuary Powers. It is specifically mentioned in the State List, indicating that the state governments have the primary authority to legislate on matters related to Public Order.

Conclusion:
In conclusion, Public Order is included in the State List of the Indian Constitution. This means that the state governments have the authority to make laws and take necessary actions to maintain public peace, prevent crime, and ensure public safety. Public Order is a crucial subject that contributes to the overall well-being of society and the protection of individual rights.