The correct answer is C. 50.
The Indira Gandhi Memorial Tulip Garden is a 50-hectare tulip garden located in Srinagar, Jammu and Kashmir, India. It is the largest tulip garden in Asia and the second largest in the world. The garden was opened in 2007 and is spread over an area of 50 hectares. It is home to over 100 varieties of tulips, which bloom from March to April. The garden is a popular tourist destination and attracts visitors from all over the world.
Option A is incorrect because the Indira Gandhi Memorial Tulip Garden is not spread over an area of 30 hectares.
Option B is incorrect because the Indira Gandhi Memorial Tulip Garden is not spread over an area of 40 hectares.
Option D is incorrect because the Indira Gandhi Memorial Tulip Garden is not spread over an area of 60 hectares.