The correct answer is option 'D', Victoria Memorial.

- The Victoria Memorial is a grand monument located in Kolkata, India. It was built in memory of Queen Victoria, who was the British monarch during the British Raj in India.

- The construction of the Victoria Memorial began in 1906 and was completed in 1921. It was designed by the architect Sir William Emerson, who drew inspiration from the Indo-Saracenic style of architecture. The monument is made of white marble and stands on a 64-acre site in the Maidan area of Kolkata.

- The Victoria Memorial is a symbol of the British colonial era in India and serves as a tribute to Queen Victoria's reign. It was commissioned by the then Viceroy of India, Lord Curzon, as a way to commemorate the Queen's death in 1901 and her role in the development of India.

- The memorial consists of a central dome, which is surrounded by several smaller domes, and is adorned with beautiful sculptures and intricate carvings. The monument houses a museum that showcases various exhibits related to the history and culture of India during the British Raj.

- The Victoria Memorial has become a popular tourist attraction and a significant landmark in Kolkata. It is surrounded by lush gardens and a large water body, adding to its aesthetic appeal. The monument's grandeur and architectural beauty make it an iconic symbol of the city.

- Today, the Victoria Memorial stands as a reminder of the colonial past and serves as a historical and cultural hub. It attracts visitors from around the world who come to admire its architectural splendor and learn about India's colonial history.

In conclusion, the Victoria Memorial was built in memory of Queen Victoria, a British monarch, and stands as a testament to the British colonial era in India.