Solution

The Painted Grey Ware Culture was a post-Harappan material culture found primarily in the Indo-Gangetic plain, named after the finely made painted grey pottery found in the region. The Ochre Coloured Pottery culture (OCP) is a Bronze Age culture of the Indo-Gangetic Plain "generally dated 2000–1500 BCE," extending from eastern Punjab to northeastern Rajasthan and western Uttar Pradesh. The Northern Black Polished Ware culture (abbreviated NBPW or NBP) is an urban Iron Age Indian culture of the Indian subcontinent, lasting c. 700–200 BCE (proto NBPW between 1200 and 700 BCE), succeeding the Painted Grey Ware culture and Black and red ware culture.