Which is the longest Canal in the world with a length of 1776 km and also considered UNESCO World Heritage site ?

A. Grand Eurasia Canal 

 B. Suez Canal 

 C. Grand Canal 

 D. Qaraqum Canal

Originally built in 468 BC, the Grand Canal is currently a UNESCO World Heritage Site. Opened in November 1869, the 193.30 km (120 miles)-long Suez Canal is an artificial sea-level waterway located in Egypt.