Which of the following river does NOT have their source in Tibet?

Brahmaputra Indus Satjuj Beas

Beas

The major river systems of Asia, namely the Indus, Sutlej, Brahmaputra, Irrawaddy, Salween and Mekong originate at the Tibetan plateau.The Beas river rises in the Himalayas in central Himachal Pradesh, India, and flows for some 470 kilometres (290 mi) to the Sutlej River in the Indian state of Punjab.