Correct Answer: (d) None of the above/more than one of the above
Note: According to first four options Nathu La is situated at the highest elevation. Nathu La is in Sikkim at an elevation of approximately 4404 m followed by Rohtang (Himachal Pradesh) 3978 m (approx.), Zojila (Ladakh) 3528 m (approx.) and Khyber (Pakistan) 1070 m (approx). But Yangzi Diwan is the India's highest Pass, since none of the above is also given as option. So, option (e) will be the right answer.