The correct answer is (b) 9.
The Uttarakhand Legislative Assembly is a unicameral legislature of the Indian state of Uttarakhand. It consists of 70 members, elected from single-member constituencies. Of these, 9 seats are reserved for candidates from the Scheduled Castes.
The Scheduled Castes are a group of historically disadvantaged communities in India. They are listed in the Constitution of India as being socially, educationally, and economically backward. Seats in the Legislative Assembly are reserved for candidates from the Scheduled Castes in order to ensure that they have a voice in government.
The other options are incorrect because they do not represent the number of seats reserved for candidates from the Scheduled Castes in the Uttarakhand Legislative Assembly.