The intermediate level of the Panchayati Raj system in Mizoram is the:

The correct answer is: b) Zilla Parishad.

The Zilla Parishad is the intermediate level of the Panchayati Raj system in Mizoram. It is a local government body that is responsible for the development of the district. The Zilla Parishad is composed of elected representatives from the Gram Panchayats and municipalities in the district. It is headed by a Chairperson, who is elected by the members of the Zilla Parishad.

The Zilla Parishad is responsible for a wide range of functions, including:

• Planning and implementing development schemes in the district
• Providing basic amenities to the people of the district
• Promoting education, health, and social welfare in the district
• Maintaining law and order in the district

The Zilla Parishad is an important institution of local self-government in Mizoram. It plays a vital role in the development of the state.

The other options are incorrect because:

• Rural Development Block is a unit of administration in India, below the district level. It is responsible for the implementation of rural development schemes.
• District Council is a local government body in the autonomous districts of India. It is responsible for the administration of the district.
• Gram Panchayat is the lowest level of the Panchayati Raj system in India. It is a local government body that is responsible for the development of the village.