1. Passage Reading
2. Verbal Logic
3. Non Verbal Logic
4. Numerical Logic
5. Data Interpretation
6. Reasoning
7. Analytical Ability
8. Quantitative Aptitude
547. (c) It is very difficult to keep them absolutely clear; Because the paragraph mention several reasons why the glasses get contaminated and the atmosphere is one of them that is why the option (c)is better than the option (a).
548. (c) perspiration from the body; Because the paragraph mentions that “On hot days the perspiration from the body may have a similar effect”.
549. (d) He is persuaded not to use glasses, if avoidable; Because throughout the passage the author has suggested the problems in using the glasses.