1. Passage Reading
2. Verbal Logic
3. Non Verbal Logic
4. Numerical Logic
5. Data Interpretation
6. Reasoning
7. Analytical Ability
8. Quantitative Aptitude
516. (c) The 'green revolution' is a mixed blessing; Because “the 'green revolution' has led to selfsufficiency in food production but it has also brought with it the formidable problem of poisoning of food grains and other eatables”
517. (b) pesticides and chemicals kill parasites and viruses, which control pests; Because some parasites and viruses which control pests are also killed by the pesticides and the chemicals.
518. (d) The excessive use of chemicals and pesticides is dangerous; Because the paragraph clearly mentions that “This is caused by excessive use of chemicals on crops and pesticide residues”.
519. (a) To an extent which becomes threatening; Literal meaning of menacing: something that threatens to cause evil, harm, injury, etc.; a threat: Air pollution is a menace to health.