Step 1: Understanding the Siwalik Group.
The Siwalik Group is a series of sedimentary rock formations in the northern part of India and Nepal. It is rich in fossils, especially mammalian fossils, and is known for its significant contribution to the study of prehistoric life.
Step 2: Analyzing the options.
(A) Haimanta Group: This group is not well-known for mammalian fossils.
(B) Jabalpur Group: This group is mainly known for its fossilized plants.
(C) Siwalik Group: Correct — The Siwalik Group is famous for its rich mammalian fossil deposits.
(D) Uttar Group: This group is not a major source of mammalian fossils.
Step 3: Conclusion.
The correct answer is (C) Siwalik Group, which is known for its rich mammalian fossil deposits.
| Group I | Group II |
| P. Dissepiment | 1. Echinodermata |
| Q. Delthyrium | 2. Trilobita |
| R. Pygidium | 3. Brachiopoda |
| S. Ambulacrum | 4. Anthozoa |