The correct answer is (c) Chamoli.
The literacy rate in Chamoli district is 67.8%, which is the lowest among all the districts in Uttarakhand. The literacy rate in Tehri Garhwal is 72.7%, the literacy rate in Pauri Garhwal is 73.5%, and the literacy rate in Udhamsingh Nagar is 76.7%.
There are a number of factors that contribute to the low literacy rate in Chamoli district. One factor is the remoteness of the district. Chamoli is located in the Garhwal Himalayas, and many of its villages are difficult to access. This makes it difficult for children to attend school, and for adults to continue their education.
Another factor that contributes to the low literacy rate is poverty. Many people in Chamoli district live below the poverty line, and they cannot afford to send their children to school. In addition, many adults in Chamoli district are illiterate, and they do not see the value of education for their children.
The government of Uttarakhand is working to improve the literacy rate in Chamoli district. The government has built new schools in remote areas, and it has provided scholarships to help children from poor families attend school. The government is also working to raise awareness about the importance of education.
Despite the challenges, there are some positive signs in Chamoli district. The literacy rate has been increasing in recent years, and more children are attending school. In addition, there is a growing awareness of the importance of education, and more adults are enrolling in literacy programs.