Match List-I with List-II and select the correct answer using the code given below the Lists : List-I (Geological time scale) A. Pleistocene B. Paleocene C. Permian D. Cambrian List-II (Life-form) 1. Mammals 2. Human genus 3. Invertebrates 4. Frogs Code :

The geological time scale correlates specific life-forms with distinct periods. The Pleistocene epoch (2.6 million to 11,000 years ago) is characterized by the evolution and diversification of the human genus, including Homo erectus and Homo sapiens [5]. The Paleocene epoch, following the K-Pg extinction, saw the significant rise and diversification of mammals [6]. The Permian period is associated with the development of early reptiles and amphibians, including the ancestors of modern frogs [6]. Finally, the Cambrian period is famous for the 'Cambrian Explosion,' where almost all major marine phyla and complex invertebrates, such as trilobites and brachiopods, first appeared in the fossil record [5]. Matching these pairs (A-2, B-1, C-4, D-3) leads to the correct sequence 2 1 4 3.

Sources

1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 3: Geological Time Scale The Evolution of The Earths Surface > Pleistocene (2.58 mya to 11,700 years ago) > p. 50
2. [5] https://www.dnr.sc.gov/geology/pdfs/education/Geologic%20Time.pdf
3. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 3: Geological Time Scale The Evolution of The Earths Surface > 3.4. Phanerozoic Eon (550 mya to present) > p. 44
4. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 3: Geological Time Scale The Evolution of The Earths Surface > 3. Geological Time Scale – The Evolution of The Earth's Surface > p. 42
5. [6] https://www.sciencedirect.com/topics/social-sciences/paleozoic-era
6. [4] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 3: Geological Time Scale The Evolution of The Earths Surface > Paleozoic Era (550 mya to 250 mya) > p. 45