The correct answer is option 3: Geeta. UNESCO has proclaimed the Geeta as a masterpiece of oral and intangible heritages of humanity.
Option 1: Purana refers to a genre of ancient Indian texts that contains mythological stories and legends. While Puranas are an important part of Hindu literature, they have not been specifically recognized by UNESCO as a masterpiece of oral and intangible heritage.
Option 2: Ramlila is a traditional performance art form that depicts the life and adventures of Lord Rama. It is popular in Northern India, particularly during the festival of Navaratri. While Ramlila is an important cultural tradition, it has not been specifically recognized by UNESCO as a masterpiece of oral and intangible heritage.
Option 4: Mahabharata is one of the two major Hindu epics, which narrates the story of the Kurukshetra War and the fates of the Kaurava and Pandava princes. While the Mahabharata is a significant piece of literature, it has not been specifically recognized by UNESCO as a masterpiece of oral and intangible heritage.
Therefore, option 3: Geeta is the correct answer as it has been proclaimed by UNESCO as a masterpiece of oral and intangible herit