Which of the following road (s) constitute Grand Trunk Road?

NH-1 and NH-2

Sher Shah Suri built the Shahi (Royal) road to strengthen and consolidate his empire from the Indus Valley to the Sonar Valley in Bengal. This road was renamed the Grand Trunk (GT) road during the British period, connecting Calcutta and Peshawar. At present, it extends from Amritsar to Kolkata. It is bifurcated into 2 segments : (a) National Highway(NH)-1 from Delhi to Amritsar, and (b) NH- 2 from Delhi to Kolkata