The correct answer is Nek Chand.

• Nek Chand developed the rock garden of Chandigarh.
  • Nek Chand was in danger of losing his job and having his art destroyed. But his work was so enchanting that they gave him permission to create a garden
  • Nek Chand was honoured with a Padma Shri in 1984.
  • In 1982, a postage stamp was issued with his work on it.
  • He passed away on June 12, 2015.
  • The garden is now cared for by his son, Anuj Saini, and the Nek Chand Foundation.
•  Hence, option 4 is correct.

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• The Rock Garden of Chandigarh is a sculpture garden for Rock enthusiasts in Chandigarh, Punjab.
  • It spreads over an area of 40 acres.
  • It is completely built from industrial, home waste, and discarded items.
  • It consists of man-made interlinked waterfalls and many other sculptures that have been made of scrap and other kinds of waste (bottles, glasses, bangles, tiles, ceramic pots, sinks, electrical waste, broken pipes, etc.) which are placed in walled paths.
  • The Rock Garden sits near Sukhna Lake.