Introduction:
A Joint State Public Service Commission (JSPSC) is an important institution in the governance structure of India. It plays a crucial role in the recruitment, appointment, and promotion of civil servants in the state government services. In this context, we will discuss the statement regarding JSPSC and explain why option 'B' is the correct answer.

Explanation:
The statement "It is a statutory body" is true regarding a Joint State Public Service Commission (JSPSC). Here's an explanation:

Definition of a Statutory Body:
A statutory body is an organization or institution created by an act of legislation, typically by the Parliament or State Legislature. It derives its powers, functions, and authority from the law. These bodies are established to perform specific tasks or functions and have a legal existence separate from the government.

Role and Functions of JSPSC:
1. Recruitment: One of the primary functions of the JSPSC is to conduct examinations and recruit suitable candidates for various posts in the state government services. These include civil services, administrative services, police services, engineering services, etc.

2. Appointment and Promotion: The JSPSC is responsible for recommending candidates for appointment to various positions in the state government. It also handles promotions, transfers, and disciplinary matters of civil servants.

3. Conducting Examinations: The JSPSC conducts competitive examinations, both preliminary and main, to assess the knowledge, skills, and aptitude of candidates applying for government posts. These examinations are conducted on a regular basis and serve as a fair and transparent method of selection.

4. Advising the Government: The JSPSC advises the state government on matters related to the recruitment, appointment, and service conditions of civil servants. It provides expert guidance and recommendations to ensure the efficient functioning of the state government machinery.

5. Maintaining Service Records: The JSPSC maintains comprehensive records of civil servants, including their personal details, qualifications, and service history. This helps in the effective management and utilization of human resources in the state government.

Conclusion:
In conclusion, a Joint State Public Service Commission (JSPSC) is a statutory body established by an act of legislation. It is responsible for the recruitment, appointment, and promotion of civil servants in the state government services. The JSPSC plays a crucial role in ensuring a merit-based and transparent system of governance in the states.