Which one of the following is NOT a river covered under the Indus Water Treaty 1960 ?

The Indus Waters Treaty (IWT), signed on September 19, 1960, between India and Pakistan, governs the sharing of the Indus River system [1]. The treaty classifies six major rivers into two categories: the Eastern Rivers and the Western Rivers [1]. India was granted exclusive rights to the three Eastern Rivers: the Ravi, Beas, and Sutlej [1]. Pakistan was allocated the three Western Rivers: the Indus, Jhelum, and Chenab [1]. The Teesta River is not part of the Indus system; it is a major tributary of the Brahmaputra River flowing through Sikkim and West Bengal into Bangladesh. While India and Bangladesh have engaged in long-term negotiations regarding the Teesta, it remains entirely separate from the 1960 Indus Waters Treaty framework. Therefore, Teesta is the river not covered under the treaty.

Sources

1. [1] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 3: The Drainage System of India > The Indus Water Treaty > p. 39