Province having the largest coastline is? A) Punjab B) Baluchistan C) Sindh D) Khyber Pakhtunkhwa Related MCQs: The Province with the longest coastline is: Name the Province which has the longest coastline? The name of the province “North West Frontier Province” was changed to Khyber Pakhtunkhwa, under which amendment of the Constitution? The largest Princely State by area at the time of partition was?