The correct answer is option 3, Shershah Suri. The Grand Trunk Road, also known as the G.T. Road, is one of the oldest and longest roads in South Asia. It was constructed by Shershah Suri, who was the ruler of the Sur Empire in the 16th century. This road was originally built to connect the eastern and western parts of the empire during his reign. It serves as a major trade and transportation route, stretching from Chittagong in modern-day Bangladesh to Kabul in Afghanistan. The construction of the Grand Trunk Road played a significant role in promoting connectivity and trade across the region, making it an important historical landmark.