The correct answer is option 1, Brahmaputra. The Brahmaputra River originates from the Chemayungdung Glacier in Tibet, which is located outside of India. The river then flows through several countries, including India, before emptying into the Bay of Bengal.

Option 2, Beas, is incorrect because the Beas River originates in the Himalayas in Himachal Pradesh, India.

Option 3, Ravi, is also incorrect because the Ravi River begins in the Indian state of Himachal Pradesh, near the Rohtang Pass.

Option 4, Jhelum, is also not the correct answer. The Jhelum River starts from a spring at Verinag in Jammu and Kashmir, India.

In summary, out of the given options, only the Brahmaputra River has its source outside of India.