Direction : A sentence is divided into four parts. The error, if any, will be one part of the sentence. The number of that part is the answer.
The Indian landmass, with its diverse topographical features (a)/and difficult terrains, poses a challenge by (b)/rendering many parts of the country incredibly (c)/difficultly for network infrastructure to reach.(d)
The Indian landmass, with its diverse topographical features (a)/and difficult terrains, poses a challenge by (b)/rendering many parts of the country incredibly (c)/difficultly for network infrastructure to reach.(d)