No. The Chambal, Betwa, and Son are major tributaries of the Ganga (Ganges), but they do not converge to create the main stem. The Ganga originates at the Gangotri Glacier in the Himalayas (Uttarakhand) and flows southeast across the North Indian Plain through Uttar Pradesh, Bihar, and West Bengal before entering the Bay of Bengal. The Chambal and Betwa join the Yamuna (a Ganga tributary), while the Son meets the Ganga directly in Bihar.