The correct answer is (a) 12.20 %.
The Schedule Castes (SCs) are a group of people who have been historically discriminated against in India. They are listed in the Indian Constitution as being socially and educationally backward. The SCs make up about 16% of the total population of India.
The 2011 census of India found that the percentage of SCs in Uttarakhand was 12.20%. This is lower than the national average of 16%. However, it is still a significant proportion of the population.
The SCs in Uttarakhand face a number of challenges, including poverty, illiteracy, and discrimination. The government of Uttarakhand has implemented a number of programs to address these challenges, but there is still much work to be done.
The other options are incorrect. Option (b) is the percentage of Scheduled Tribes in Uttarakhand, option (c) is the percentage of Other Backward Classes in Uttarakhand, and option (d) is the percentage of Muslims in Uttarakhand.