Arrange the following in ascending order starting from the earliest period: A.…

Concept

A chronology question is solved by attaching an approximate date to each item and then ordering them from earliest to most recent. In Indian history these landmarks are dated relative to the present ("years ago"): the larger the "years ago" figure, the earlier the item. When a site was occupied over a span of time, the standard school timeline places it by where that occupation is conventionally plotted, not by a single endpoint.

Application

Assigning each item its standard textbook date:

1. Vedas — composition begins: about 3500 years ago. The Rigveda is the oldest of the four Vedas, and the start of Vedic composition is the earliest landmark here.

2. Megaliths — building begins: about 3000 years ago. These large stone burial structures, associated with Black-and-Red ware and iron objects, are plotted after the start of Vedic composition.

3. Inamgaon — settlement of farmers: occupied roughly 3600 to 2700 years ago. This farming village on the Ghod river was settled over a span; in the standard school timeline it is plotted after the megaliths entry, reflecting its main, well-attested phase.

4. Charaka — physician: about 2000 years ago. Author of the Charaka Samhita, a treatise on medicine, and the most recent of the four.

Reading the timeline from earliest to latest in this way gives Vedas, then megaliths, then Inamgaon, then Charaka — the sequence A, B, C, D.

Cross-check

Charaka, at about 2000 years ago, is firmly the most recent and the start of Vedic composition, at about 3500 years ago, is the oldest. The Inamgaon settlement spans a long period, so its placement follows the convention of the school timeline this question is drawn from, which plots it just before Charaka and after the megaliths.