Punjab is called the 'Land of Five Rivers' because its name comes from Persian words 'Panj' (five) and 'Ab' (water/rivers), referring to the five rivers that flow through the region: Jhelum, Chenab, Ravi, Beas, and Sutlej. Kolkata is a major city in East India, Sikkim is a northeastern state, and Manipur is also in the northeast - none are associated with five rivers.