who built the ram setu bridge to reach lanka
Adam's Bridge The bridge was first mentioned in the ancient Indian Sanskrit epic Ramayana of Valmiki.[4] The name Rama's Bridge or Rama Setu (Sanskrit; setu: bridge) refers to the bridge built by the Vanara (ape men) army of Rama in Hindu theology with instructions from Nala,[5] which he used to reach Lanka and rescue his wife Sita from the Rakshasa king, Ravana.[4] The Ramayana attributes the building of this bridge to Rama in verse 2-22-76, naming it as Setubandhanam, a name that persists until today.[6]
Tin Bigha Corridor According to the Indira Gandhi-Sheikh Mujibur Rahman treaty of 16 May, 1974, India and Bangladesh were to hand over the sovereignty of the Tin Bigha Corridor (178 by 85 metres (584 ft × 279 ft)) and South Berubari (7.39 km2 (2.85 sq mi)) to each other, thereby allowing access to the Dahagram–Angarpota enclaves and the Indian enclaves adjacent to South Berubari. Bangladesh did hand over the sovereignty of the smaller South Berubari to India instantly in 1974. India, however, could not transfer the Tin Bigha Corridor to Bangladesh as it required constitutional amendment which could not be done due to political reasons.[2][3]