Which river is NOT a tributary of the Krishna River?

The Tawa River is a tributary of the Narmada River, not the Krishna River. It originates in the Satpura range of Madhya Pradesh and flows into the Narmada River near Hoshangabad. The Krishna River, one of peninsular India's major rivers, begins in Mahabaleshwar, Maharashtra, and flows through Karnataka, Telangana, and Andhra Pradesh before reaching the Bay of Bengal. Its major tributaries include the Koyna, Bhima, Tungabhadra, Ghataprabha, Malaprabha, and Musi rivers.