(General English) NDA/NA Solved Paper 2017-I

                                                            Passage - 1
We had just passed Tenali, where I roused myself in order to hear the name of the station. As I was falling asleep again, a violent jolt shot me into the arms of somebody in the seat opposite. The engine with one wheel broken was lying across the track and beside it was the luggage van, likewise, derailed. Groaning, wheezing, gasping, sputtering in its death agony, the engine was like a fallen horse which, snorting, trembling in every limb, its flanks heaving, its chest labouring, seems incapable of making the smallest effort to struggle on to its legs again.

The author had roused himself as he wanted to

                                                            Passage - 2

I was beginning to tire a little now. I had been cutting steps continuously for two hours, and Tenzing, too was moving very slowly. As I chipped steps around still another corner, I wondered rather dully just how long we could keep it up. Our original zest had now quite gone and it was turning more into a grim struggle. I then realised that the ridge ahead, instead of still monotonously rising, now dropped sharply away, and far below I could see the North Col and Rongbuk glacier. I looked upwards to see a narrow ridge running up to a snowy summit. A few more whacks of the ice-axe in the firm snow and we stood on top.

Which of the following is the most appropriate descriptic of the area in which the narrator had been moving?