The correct option is A Bangladesh
The South Asian Association for Regional Cooperation (SAARC) was established with the signing of the SAARC Charter in Dhaka on 8 December 1985. SAARC comprises of eight Member States: Afghanistan, Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan and Sri Lanka. Out of which, the population density of Bangladesh is highest followed by the Maldives whereas Bhutan has the lowest population density.