The correct answer is: Both (A) and (R) are true, but (R) is not the correct explanation of (A).
The Ladakh plateau is a high-altitude region in the Indian Himalayas. It is one of the coldest places on Earth, with average temperatures in winter ranging from -20°C to -30°C. The reason for the cold temperatures in Ladakh is its high altitude. The higher the altitude, the lower the air pressure and the colder the temperature.
The reason given in the question is that Ladakh is situated in high altitudinal areas of Greater Himalayas. This is true, but it is not the only reason for the cold temperatures in Ladakh. The high altitude is a major factor, but other factors such as the region’s dry climate and its distance from the sea also contribute to the cold temperatures.
Therefore, both (A) and (R) are true, but (R) is not the correct explanation of (A).