The correct option is Sahara - Hot Desert
Explanation
Deserts are arid regions characterized by scanty vegetation and extreme temperatures. Depending on the temperature range and latitudinal location, deserts are primarily classified into Hot Deserts (typically subtropical) and Cold Deserts (temperate, high altitude, or continental interiors).
Analysis of Options:
- (a) Sahara - Cold Desert: Incorrect. The Sahara is the world's largest hot desert, covering most of North Africa. It is situated in the subtropical high-pressure belt where descending air inhibits precipitation.
- (b) Ladakh - Hot Desert: Incorrect. Ladakh is a cold desert located in the Great Himalayas of India. Its arid conditions result from its high altitude and its location in the rain shadow of the Himalayas, which prevents moisture-laden monsoon winds from reaching the region.
- (c) Sahara - Hot Desert: Correct. The Sahara is the archetypal hot desert characterized by scorching daytime temperatures and significant diurnal temperature variations.
- (d) Gobi - Tropical Desert: Incorrect. The Gobi Desert is a cold desert located in Central Asia (spanning parts of northern China and southern Mongolia). It is a mid-latitude desert formed due to its interior continental location and the rain shadow effect of the Himalayas, resulting in harsh, cold winters.
Key Takeaway:
Hot Deserts (e.g., Sahara, Thar) are found in subtropical regions due to high-pressure belts, while Cold Deserts (e.g., Ladakh, Gobi) are found in high altitudes or high latitudes (temperate zones) often due to continentality or rain-shadow effects.