(a) Measurement of land

(b) Coins of different monetary value

(c) Classification of urban land

(d) Religious rituals

Answer: a

Explanation:

 Texts and inscriptions mention various land measure terms. The angula (probably ¾ inch) was the smallest measure. The hasta (cubit) was the standardised distance between the tip of the elbow and the middle finger (18 inches). Larger units of measure included the dhanu/danda and nala.

The land measures used in eastern India included the adhavapa (3/8–1/2 acre), dronavapa (1½–2 acres), and kulyavapa (12–16 acres).

Hence, option a is correct.

Read: Previous Year UPSC History Questions (PYQs) With Explanation 2020