Arrange the following in ascending order starting from the earliest period A. Beginning of the composition of the Vedas B. Beginning of the building of megaliths. C. Settlements of Farmers at Inamgaon D. Charaka

From earliest to latest: the Vedas began to be composed around 1500 BCE (A); megaliths began to be built around 1000 BCE (B); Inamgaon was an early farming settlement that was occupied until around 700 BCE but its question framing places it after megaliths in NCERT chronology table (C); Charaka, the famous physician, lived around the 2nd century CE (D). Per the standard NCERT timeline for class VI history, the ascending order is A, B, C, D.