Which of the following rivers is NOT the part of Sapta-Sindhu,

Sapta-Sindhu (Seven Rivers):
The term Sapta-Sindhu refers to the region of the seven rivers mentioned in the Rigveda, where the early Vedic Aryans lived.
These rivers are generally identified as:
Sindhu (Indus)
Vitasta (Jhelum)
Asikni (Chenab)
Parushni (Ravi)
Vipasha (Beas)
Shutudri (Sutlej)
Saraswati (a now-extinct river, believed to have flowed in northwestern India).
Geographical Location:
The Sapta-Sindhu region corresponds to northwest India and eastern Pakistan, mainly the Punjab area.
It was the cradle of early Vedic civilization, where hymns of the Rigveda were composed.
Why Ganga is not included:
The Ganga river lies further east, in the Gangetic plains.
It became prominent in later Vedic and post-Vedic periods, but not during the early Rigvedic era.
Thus, while the Ganga is sacred in Hindu tradition, it was not part of the original Sapta-Sindhu region.
In short: The Ganga river is not part of the Sapta-Sindhu; the seven rivers were mainly in the Punjab and northwestern region, central to the early Vedic Aryan settlement.