The correct answer is: a) Sidkeong Tulku Namgyal.
Sidkeong Tulku Namgyal was the Chogyal of Sikkim from 1864 to 1874. He was known for his efforts to modernize Sikkim, including the establishment of a school system, a postal service, and a police force. He also built roads and bridges, and encouraged the development of agriculture and industry.
Sidkeong Tulku Namgyal was born in 1846 in Gangtok, Sikkim. He was the son of Tshudpud Namgyal, the Chogyal of Sikkim from 1856 to 1864. Sidkeong Tulku Namgyal was educated in India and England. He returned to Sikkim in 1864 after the death of his father.
Sidkeong Tulku Namgyal was a progressive ruler. He believed that Sikkim needed to modernize in order to survive. He established a school system, a postal service, and a police force. He also built roads and bridges, and encouraged the development of agriculture and industry.
Sidkeong Tulku Namgyal died in 1874 at the age of 28. He was succeeded by his son, Thutob Namgyal.
The other options are incorrect.
- Palden Thondup Namgyal was the Chogyal of Sikkim from 1963 to 1975. He was a popular ruler who was known for his efforts to improve the lives of his people.
- Tshudpud Namgyal was the Chogyal of Sikkim from 1856 to 1864. He was a conservative ruler who resisted efforts to modernize Sikkim.
- Tensung Namgyal was the Chogyal of Sikkim from 1670 to 1700. He was a powerful ruler who expanded the territory of Sikkim.