The world’s largest tropical rainforest Amazon rain forests are called "Lungs of the Earth". It is so called because it produces 20% of the Earth's oxygen, and is also a vast carbon sink, absorbs more than 1 billion tons of atmospheric carbon which is emitted by the burning of fossil fuels annually.
Who amongst the following became the only sports person to have been awarded all the three maor sports awards viz.Drona Charya Award, Rajiv Gandhi Khel Ratna Award and Arjuna Award?