The correct answer is: b) Nepal.
The Limbu people are an ethnic group native to the eastern Himalayas. They are found in Nepal, Bhutan, India, and China. The Limbu people of Sikkim share cultural similarities with their counterparts in Nepal. This is because the Limbu people of Sikkim are descended from Limbu people who migrated from Nepal to Sikkim in the 18th century. The Limbu people of Sikkim speak the Limbu language, which is a Tibeto-Burman language. The Limbu people of Sikkim are predominantly Hindu. They practice a form of Hinduism that is influenced by their traditional beliefs. The Limbu people of Sikkim are known for their unique culture and traditions. They are a proud and independent people who have a strong sense of community.
The other options are incorrect because:
- Tibet is a country in Central Asia. The Limbu people are not found in Tibet.
- Bhutan is a country in the eastern Himalayas. The Limbu people are found in Bhutan, but they do not share cultural similarities with the Limbu people of Sikkim.
- Assam is a state in India. The Limbu people are found in Assam, but they do not share cultural similarities with the Limbu people of Sikkim.