Explanation:

The correct answer is option B) Muqtis.

Introduction:
In the medieval Islamic world, the system of iqtas was established as a way to administer and govern the conquered territories. The iqtas were land grants given to military officers in return for their services to the state. The muqtis were the individuals who were appointed to manage and govern these iqtas.

Duties of Muqtis:
The primary duty of muqtis was to lead military campaigns and maintain laws and order in their iqtas. They acted as military commanders and were responsible for protecting the territories assigned to them. They organized and led military expeditions to defend the iqtas against external threats and rebellions.

Leadership in Military Campaigns:
Muqtis were required to possess military skills and leadership qualities to effectively lead the military campaigns. They had to strategize and plan military operations, deploy troops, and engage in battles to protect and expand their territories. They were responsible for maintaining the security and stability of their iqtas through military means.

Maintenance of Laws and Orders:
In addition to their military responsibilities, muqtis also had the duty to maintain laws and orders in their iqtas. They acted as local administrators and were responsible for enforcing the legal system, resolving disputes, and ensuring justice in their territories. They appointed judges, collected taxes, and maintained law and order to ensure the smooth functioning of their iqtas.

Importance of Muqtis:
Muqtis played a crucial role in the governance and administration of the iqtas. Their military leadership and administrative abilities were essential for maintaining the stability and security of the conquered territories. They acted as the link between the central government and the local population, ensuring that the laws and policies of the state were implemented effectively.

Conclusion:
The muqtis were entrusted with the responsibility of leading military campaigns and maintaining laws and orders in their iqtas. Their role was crucial in ensuring the stability, security, and effective governance of the conquered territories.