Option d is the correct answer The correct matches are A-4, B-3, C-1, D-2. The Indus civilisation that appeared in the northwestern part of India and Pakistan in third millennium BCE is collectively called the Indus Civilisation. Since Harappa was the first site to be identified in this civilisation, it is also known as Harappan Civilisation. The Indus Civilisation represents the first phase of urbanisation in India. The Later Vedic culture is dated to the period between 1000 BCE and 700-600 BCE. Agricultural activities increased during the Late Vedic period. The Satapatha Brahmana mentions rituals related to ploughing undertaken by the kings. This suggests the importance given to cultivation by the rulers, and the shift to agriculture to support the increasing population. Rig Vedic Samhita is the earliest text that relates to the Early Vedic period. The Early Vedic culture is placed between 1500 BCE and 1000 BCE. The Rig Vedic people mainly practiced Pastoralism. Cattle rearing was an important economic activity for the Aryans. Cattle were considered wealth by the Aryans. Medieval phase of Indian history can be related to the time period between the 6th century and 16th century A.D. It was marked by increase land lordism and Monarchial system.