Correct Option
All three statements accurately describe the likely geographical impacts on India if the Himalayan ranges were absent.
- Statement 1: The Himalayas act as a formidable barrier against the cold, dry winds originating from Siberia and Central Asia during winter. Without this mountain range, these frigid air masses would sweep across the Indian subcontinent, leading to significantly colder winters and a climate more akin to the continental interiors of Central Asia.
- Statement 2: The major perennial river systems of North India, including the Indus, Ganga, and Brahmaputra, originate from the Himalayas. These rivers carry immense quantities of sediment, which have accumulated over geological timescales to form the vast and fertile Indo-Gangetic plains. In the absence of the Himalayas, the source of these rivers and the mechanism for the deposition of such extensive alluvial soils would be missing, fundamentally altering the landscape and agricultural potential of the region.
- Statement 3: The Himalayas are crucial in shaping the Indian monsoon. They act as a physical obstruction, forcing the moisture-laden southwest monsoon winds to ascend, cool, and condense, resulting in widespread rainfall across India. Furthermore, their presence influences the formation and positioning of the monsoon trough. Without the Himalayas, the monsoon winds would likely pass over the subcontinent with reduced precipitation, carrying their moisture further north into Tibet or Central Asia, thereby drastically changing India's present monsoon pattern and rainfall distribution.
Incorrect Options
Options (a), (b), and (c) are incorrect because they fail to include all the significant geographical impacts that would result from the absence of the Himalayan ranges. As all three statements (1, 2, and 3) correctly identify major consequences, the option encompassing all three is the most accurate answer.