291: The crop which grows in alluvial soil and needs 150 cm rainfall is:
(a) Wheat
(b) Rice
(c) Groundnut
(d) Sugarcane
292: The original name of Mahabharata was
(a) Brihit Katha
(b) Sahastra Samhita
(c) Jaya Samhita
(d) Rajatarangini
293: Acid rain is caused by pollution of environment by:
(a) Carbon dioxide and nitrogen
(b) Carbon monoxide and carbon dioxide
(c) Ozone and carbon dioxide
(d) Nitrous oxide and sulphur dioxide
294: If the product of two numbers is 320 and their ratio is 1 : 5, what is the difference between the squares of these two numbers ?
(a) 1024
(b) 1365
(c) 1536
(d) 1635
295: Consider the following statements about the megacities of India :
I. Population of each megacity is more than 5 million.
II. All the megacities are important sea ports.
III. Megacities are either national or State capitals.
Which of these statements are correct ?
(a) I, II and III
(b) I and II
(c) II and III
(d) I and III