Which of the following is/are CORRECT related to MS Swaminathan?

I. Prime Minister Narendra Modi announced that an agriculture scientist MS Swaminathan will be honoured with the Bharat Ratna.

II. M.S. Swaminathan was an Indian agronomist, agricultural scientist, plant geneticist, administrator, and humanitarian.

III. He has been recognized as the "Father of Economic Ecology" by the United Nations Environment Programme for his contributions to sustainable agriculture and environmental conservation.

IV. His tenure as the director general of the International Rice Research Institute (IRRI) was pivotal, leading to him being awarded the first World Food Prize in 1987.