Ancient Indian Architecture

The passage highlights the evolution of well architecture from Dholavira’s simpler forms to the more intricate and grand structures found in Gujarat and Rajasthan during classical times. These later wells are described as both “engineering marvels” and “works of art”, indicating not only their structural sophistication but also their aesthetic appeal. Hence:

Option (b) is correct: They are engineering marvels.
Option (c) is correct: They are also described as works of art.
Option (a) is incorrect: They are explicitly praised, not poorly designed.
Option (d) is incorrect: “Modest” refers to older wells like those in Dholavira, not the ones in Gujarat and Rajasthan.