The correct answer is: A. Jammu
Gurudwara Sunder Singh is a historical gurdwara located in the city of Jammu, India. It is one of the most important gurdwaras in the state of Jammu and Kashmir. The gurdwara was built in the 19th century by Maharaja Ranbir Singh, the ruler of Jammu and Kashmir. It is dedicated to Guru Gobind Singh, the tenth Sikh Guru. The gurdwara is a popular pilgrimage site for Sikhs from all over the world.
Option B, Doda, is incorrect because Gurudwara Sunder Singh is not located in Doda. Doda is a town in the Indian state of Jammu and Kashmir. It is the headquarters of Doda district.
Option C, Kathua, is incorrect because Gurudwara Sunder Singh is not located in Kathua. Kathua is a town in the Indian state of Jammu and Kashmir. It is the headquarters of Kathua district.
Option D, Srinagar, is incorrect because Gurudwara Sunder Singh is not located in Srinagar. Srinagar is the summer capital of the Indian state of Jammu and Kashmir. It is the largest city in the state.