Sri Lanka became a founding member, in 1985, of which regional bloc, alongside India and Pakistan?

The correct answer is SAARC, the South Asian Association for Regional Cooperation, which Sri Lanka co-founded in 1985 together with India, Pakistan, Bangladesh, Nepal, Bhutan, and the Maldives — seven original members later joined by Afghanistan in 2007, bringing the total to eight. SAARC was established with the goal of promoting economic growth, social progress, and cultural development among South Asian nations through collective action, and its charter was signed in Dhaka, Bangladesh, in December 1985, which is why Dhaka is also home to the SAARC Secretariat. As a founding member, Sri Lanka has hosted SAARC summits and played an active role in the organisation's agenda on trade, connectivity, and regional security cooperation over the following decades, even as the bloc's momentum has fluctuated due to periodic India-Pakistan tensions. BIMSTEC, option C, the Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation, does include Sri Lanka as a member, but it was established later, in 1997, and has a different founding membership and mandate focused specifically on Bay of Bengal littoral and adjoining states, making it a common point of confusion with SAARC precisely because Sri Lanka belongs to both. The Commonwealth of Nations, option D, is a much older and broader voluntary association of mostly former British colonies spanning multiple continents, not a South Asian regional economic bloc, and while Sri Lanka is indeed a Commonwealth member, that membership has nothing to do with the 1985 founding described in the question. A frequent exam trap is muddling SAARC's 1985 founding date and membership list with BIMSTEC's later 1997 formation, so candidates should anchor the year 1985 and the Dhaka signing firmly to SAARC. Revision takeaway: SAARC, 1985, Dhaka, eight members including Sri Lanka and India.