Which of the following statement/s is true about the sustainable development? 1. It was introduced in early 1980's in particular through the publication of the World Conservation Strategy by IUCN, UNEP and WWF 2. It was introduced in early 1992's on the recommendation of Brettonwoods commission. 3. It was introduced in early 1980's on the recommendation of Brundtland commission. 4. It means that Present generation should fulfill its needs while considering the needs of the future generation as well.

Answer: Option B