Match List I with List II and select the correct answer using the code given below:
List - I [Mountain Type] - List II [Mountains (India)]
(a) Folded (New) - (i) Sahayadri
(b) Residual - (ii) Himalaya
(c) Volcanic - (iii) Rajmahal Hills
(d) Block - (iv) Aravalli
Code :

Question

Match List I with List II and select the correct answer using the code given below: 
List - I [Mountain Type] - List II [Mountains (India)]
(a) Folded (New) - (i) Sahayadri
(b) Residual - (ii) Himalaya
(c) Volcanic - (iii) Rajmahal Hills
(d) Block - (iv) Aravalli
Code :

Accepted Answer

Here's a detailed explanation justifying why Option 4 is the correct answer and why the other options are incorrect:

**Justification for Option 4 being correct:**

Option 4: (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i) correctly matches the mountain types with their examples in India. Let's break it down:

*   **(a) Folded (New) - (ii) Himalaya:** The Himalayas are a classic example of young fold mountains. They were formed by the collision of the Indian and Eurasian tectonic plates, resulting in the folding and uplift of the Earth's crust. This makes the Himalayas a relatively young and actively growing mountain range.

*   **(b) Residual - (iv) Aravalli:** The Aravalli Range is a prime example of residual mountains. These mountains are formed by the denudation (weathering and erosion) of pre-existing mountains. The Aravallis were once a much higher range, but over millions of years, they have been eroded down to their current form, leaving behind a "residual" mountain range.

*   **(c) Volcanic - (iii) Rajmahal Hills:** The Rajmahal Hills are formed due to volcanic activity. These hills are composed of basaltic lava flows, indicating their volcanic origin.

*   **(d) Block - (i) Sahayadri (Western Ghats):** The Sahayadri, also known as the Western Ghats, are considered a block mountain range. Block mountains are formed when large areas of the Earth's crust are broken into blocks by faults. The uplifted blocks form the mountains, and the down-dropped blocks form valleys or basins. The Western Ghats were formed due to the down-faulting of the western edge of the Deccan Plateau.

**Why other options are incorrect:**

*   **Option 1: (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii):** This option incorrectly matches the mountain types. It suggests that the Aravalli are folded mountains, which is wrong as they are residual mountains. It also incorrectly links the Himalayas to residual mountains, which is incorrect as they are folded mountains. The Sahyadri are not volcanic and the Rajmahal hills are not block mountains.

*   **Option 2: (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv):** This option incorrectly matches the residual mountains to Sahyadri, which are block mountains. It also incorrectly links the block mountains to Aravalli, which are residual mountains.

*   **Option 3: (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i):** This option incorrectly matches the residual mountains to Rajmahal hills, which are volcanic mountains. It also incorrectly links the volcanic mountains to Aravalli, which are residual mountains.