The correct answer is (a) Almora.
Almora district has the highest sex ratio in Uttarakhand, with 971 females per 1000 males. This is significantly higher than the national average of 940 females per 1000 males.
The high sex ratio in Almora is likely due to a number of factors, including the fact that the district is a popular tourist destination, which attracts a large number of unmarried men. Additionally, the district has a strong tradition of female education and employment, which means that women are more likely to be economically independent and have a higher social status.
The high sex ratio in Almora is a positive development, as it indicates that the district is a safe and welcoming place for women. It is also a sign that the district is economically prosperous and has a strong social fabric.
The other options are incorrect because they have lower sex ratios than Almora. Dehradun has a sex ratio of 941 females per 1000 males, Pauri has a sex ratio of 938 females per 1000 males, and Pithoragarh has a sex ratio of 936 females per 1000 males.