Mountains and Plateaus of India

A is correct because Kachchh and Kathiawar are in western India and belong to its regional upland landscape, not to the Himalayan mountain system in the north. Their location and geological setting are distinct from the young, high Himalayan ranges.

A is correct. Kolli and Pachamalai are hill groups in Tamil Nadu associated with the Eastern Ghats, a discontinuous range system along eastern peninsular India. The other options refer to mountain systems in different parts of India.

A is correct. The Biligirirangan (B.R.) Hills in southern India lie in the transition area between the Eastern and Western Ghats. The other pairs are either separate northern mountain ranges or river deltas, not the mountain systems connected by these hills.

A is correct. The Satmala and Ajanta Hills are hill ranges in Maharashtra and form part of the Deccan Plateau's relief. The other options describe features in Sikkim, Meghalaya, or the Thar Desert, not these Maharashtra hills.

The Western Ghats form a nearly continuous, high escarpment along the western margin of the Deccan Plateau. They run roughly parallel to the Arabian Sea coast, leaving only a relatively narrow coastal plain between the mountains and the sea. This physical arrangement explains why option A is correct. The Ghats also influence rainfall: moisture-laden southwest monsoon winds rise over them and produce heavy orographic rain on the western side. The Eastern Ghats are a separate, more discontinuous range, while the Aravallis and Meghalaya Plateau do not describe this plateau–coast relationship. The key idea is “Deccan Plateau–Western Ghats–narrow western coastal plain.”