(A) Small country of Europe
Belgium is a small country in Europe, smaller in area than the state of Haryana, with a population of a little over one crore.
Source: Belgium and Sri Lanka, Chapter 1
The passage explicitly states "Belgium is a small country in Europe, smaller in area than the state of Haryana." Options B, C, and D are factually wrong on both size and continent. In MCQs, always look for the exact phrase used in the textbook.