Correct option is C
The Ganga and Yamuna rivers, two of the most revered rivers in Indian culture, are first mentioned together in the Satapatha Brahmana, a significant text associated with the Shukla Yajurveda.
The Rigveda is the oldest of the Vedas, and it contains references to the Sarasvati and Yamuna, but not the Ganga.
The Chhandogya Upanishad is a philosophical text and one of the oldest Upanishads. While it deals with metaphysical concepts, it does not focus on the geographical or cultural mention of rivers like Ganga and Yamuna.
