The correct answer is: a) Remote areas.
Limited resources and capacity can be a challenge for effective administration in Sikkim, especially in remote areas. This is because remote areas are often difficult to access, which can make it difficult to provide basic services such as education, healthcare, and law enforcement. Additionally, remote areas may have a smaller population, which can make it difficult to generate revenue and fund essential services.
Urban centers, border regions, and areas with high tourist traffic also face challenges, but these challenges are different from those faced by remote areas. Urban centers often have a large population, which can make it difficult to provide essential services such as transportation, sanitation, and housing. Border regions may be subject to conflict or instability, which can make it difficult to provide security and maintain law and order. Areas with high tourist traffic may face challenges such as overcrowding, pollution, and environmental degradation.
Overall, remote areas face the most significant challenges for effective administration. This is because remote areas are often difficult to access, have a smaller population, and may be subject to conflict or instability.