Answer: D

Explanation:

In contrast to the hard and stable peninsular section, the geological structure of the Himalayas and extra-peninsular ranges is young, weak and flexible. Even in the present times, these mountains are affected by the interactions of exogenous and endogenic forces. As a result, folds, faults and thrusts are formed in them. The origin of these mountains is related to tectonic movements. These mountains, eroded by fast flowing rivers, are still in their youth. Gorges, V-shaped valleys, creeks and waterfalls etc. are proof of this. Hence, option (d) is the correct answer.

Answer: A

Explanation:

The plain of Northern India is made up of alluvial deposits carried by the Indus, Ganga and Brahmaputra rivers. The east to west length of this plain is approximately 3200 kilometers. Its average width is 150 to 300 kilometers. The maximum depth of alluvial deposits is 1000 to 2000 meters. Hence, statement 1 is correct.

From north to south, these plains can be divided into three parts; Bhabhar, Terai and alluvial plains. The alluvial plain is further divided into two parts – Khadar and Bangar. Hence, statement 2 is incorrect.

Bhabhar is a thin strip of 8 to 10 kilometers wide which extends parallel to the Shivalik Range. As a result, the rivers coming out of the Himalayan mountain ranges deposit huge water loads like big rocks and boulders here and sometimes themselves get lost in it. To the south of Bhabhar is the Terai region whose width is 10 to 20 kilometers. In the Bhabhar region, extinct rivers emerge on the surface in this region and because they do not have definite channels, this region becomes isolated, which is called Terai. Hence, statement 3 is incorrect.

Answer: A

Explanation:

The islands of the Arabian Sea include Lakshadweep and Minicoy. These islands are scattered between 80°N to 12°N and 71°E to 74°E. It is located 280 kilometers to 480 kilometers away from the Kerala coast. The entire island group is made up of coral deposits. Hence, statement 1 is correct.

There are 36 islands and 11 of these are inhabited by humans. Minicoy is the largest island with an area of ​​453 square kilometers. The entire island group is divided into two parts by the 11° Channel, Amini Island in the north and Cananore Island in the south. This group of islands has storm-formed mounds on which unconsolidated pebbles, shingles, rocks and boulders are found on the eastern seaboard. Hence, both statements 2 and 3 are incorrect

Answer: A

Explanation:

Mizoram, also known as 'Molasse Basin', is made up of soft and unconsolidated rocks. Most of the rivers flowing in Nagaland are tributaries of the Brahmaputra River. The two rivers of Mizoram and Manipur are tributaries of the Barak River, which is a tributary of the Meghna River. Hence, option (a) is the correct answer.

Answer: C

Explanation:

The Deccan Plateau has the Western Ghats in the west, the Eastern Ghats in the east and the Satpura, Maikal and Mahadev Hills in the north. - The Western Ghats have been given many local names, such as Sahyadri in Maharashtra, Nilgiri in Karnataka and Tamil Nadu and Anamalai and Cardamom Hills in Kerala. The Western Ghats are higher and more continuous than the Eastern Ghats. Their average height is about 1500 meters, which increases from north to south. The highest peak of the Peninsular Plateau is Anaimudi (2695 m), located in the Anamalai Hills of the Western Ghats. The second highest peak is Dodabetta and is in the Nilgiri Hills. Hence, statement 1 is incorrect.

Most of the peninsular rivers originate from the Western Ghats. The Eastern Ghats are not continuous and are eroded by the Mahanadi, Godavari, Krishna and Kaveri rivers. Some of the main ranges here are Javadi Hills, Palakonda Range, Nallamala Hills and Mahendragiri Hills. The Eastern and Western Ghats meet each other in the Nilgiri Hills. Hence, statement 2 is incorrect.