United tions, March 16: Famous for its pursuit of Gross tiol Happiness, Bhutan has a new cause for joy: In recognition of its Gross tiol Income (GNI) growth and social development, the kingdom is poised to graduate from the UN category of the world’s poorest known as the Least Developed Countries (LDC). However, two other South Asian tions, Nepal and Bangladesh, will continue in the LDC category although they have recorded progress, the UN panel that recommends changes to the list said Thursday.