226: If safe storage is to be ensured, the moisture content of food grains at the time of harvesting should not be higher than
(a) 14%
(b) 16%
(c) 18%
(d) 20%
227: In which organ of the human body are the lymphocyte cells formed?
(a) Liver
(b) Long bone
(c) Pancreas
(d) Spleen
228: The evidence for the rotation of stars comes mainly from the
(a) Doppler effect
(b) Photoelectric effect
(c) Stark effect
(d) Zeeman effect
229: The average salary of skilled employees in a firm is Rs. 520 and that of the unskilled employees is Rs. 420. If the average salary of both the groups of employees is Rs. 500, then the percentage of skilled employees in the firm is
(a) 50
(b) 20
(c) 80
(d) 70
230: Which one of the following Venn diagrams correctly illustrates the relationship among the classes: Carrot, Food, Vegetable ?