Solution:The constant flow of wealth from India to England for which India did not get an adequate economic, commercial or material return has been described by national leaders and economists as drain of wealth from India.Before 1813 company had recurring surplus which accrued from (a) profit from oppressive land revenue policy (b) profits form its trade resulting from monopolistic control over Indian markets and exactions (c) made by the company's officials. All this surplus was used by the Company as an "investment." i.e. for making a purchase of exportable items in India and elsewhere.
Against the exports of goods made out of this investment, India did not get anything in return. This system was brought to an end by the charter act of 1813. From 1813 onwards economics drain took the form of ' unrequited' exports.
Baring a few exceptional years a favourable balance of trade had been the normal feature of our foreign trade till the outbreak of world war II. Therefore, it is clear that (A) and (R) is the correct explanation of (A). Dadabhai Naoroji described the drain of wealth as the "evil of all evils" and the leading cause of India poverty.