The correct answer is option 2 - Sindu. The Sindu River, also known as the Indus River, originates from the Trans Himalayas. It is one of the longest rivers in Asia and flows through the countries of India and Pakistan. The river is formed by multiple tributaries that originate from the Tibetan Plateau in the Trans Himalayas. It then flows through the mountainous regions of Ladakh and Gilgit-Baltistan before entering Punjab, where it eventually merges with the Arabian Sea. The Sindu River has immense cultural and historical significance, as it was the birthplace of the Indus Valley Civilization, one of the world`s oldest urban civilizations.