English Language (Comprehension) (UPSC)

14. They took a long time to finish the work because : [2011-II]

1. (a) they were very tired.
2. (b) there was not enough air to breathe.
3. (c) it was very cold.
4. (d) it was very dark.

Correct Answer: (b) there was not enough air to breathe.
Note:
They took a long time to finish the work because there was not enough air to breathe at such a high altitude. All the other three options (a), (c) and (d) are true, but they are not clearly stated in the passage as in the case of option (b).