The correct answer is (b), 90.
Uttarakhand is a state in India with a total of 90 blocks. These blocks are further divided into 13 districts. The blocks in Uttarakhand are:
- Almora
- Bageshwar
- Chamoli
- Champawat
- Dehradun
- Haridwar
- Nainital
- Pauri Garhwal
- Pithoragarh
- Rudraprayag
- Tehri Garhwal
- Udham Singh Nagar
Each block has its own administrative headquarters, which is usually a town or a large village. The block is headed by a Block Development Officer (BDO), who is a government official. The BDO is responsible for the development and administration of the block.
The blocks in Uttarakhand are responsible for a variety of services, including:
- Education
- Health
- Agriculture
- Rural development
- Public works
- Social welfare
The blocks in Uttarakhand play an important role in the development of the state. They are responsible for providing basic services to the people and for promoting economic development.