121: Which of the following adds/add nitrogen to the soil?
1. Excretion of urea by animals
2. Burning of coal by man
3. Death of vegetation
Select the correct answer using the codes given below.
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
122: At a given time, two players are standing on a play-field. The cartesian coordinates of their locations are (20, 60) and (-40, -20) units. What is the distance between the players ?
(a) 60 units
(b) 80 units
(c) 100 units
(d) 140 units
123: A and B can do a piece of work in 4 days. If A can do it alone in 12 days, how much time B will take to finish it alone?
(a) 4 days
(b) 6 days
(c) 8 days
(d) 10 days
124: Indian National Congress was founded by:
(a) W. C. Bannerjee
(b) A. O. Hume
(c) Mahatma Gandhi
(d) Annie Besant
125: What does "Roaring Forties" refer to?
(a) The tract of stormy westerly winds between latitudes 20°-30°S
(b) Whirl winds caused in Atlantic Ocean
(c) The region between latitudes 40° and 50°S, where the prevailing westerly winds blow over the open oceans with great regularity and strength
(d) None of these