226: The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs
(a) the water vapour of the air and retains its heat
(b) the ultraviolet part of the solar radiation
(c) all the solar radiations
(d) the infrared part of the solar radiation
227: The first venture of Gandhi in all India politics was the
(a) Non-Cooperation Movement
(b) Rowlatt Satyagraha
(c) Champaran Movement
(d) Dandi March
228: Dry Farming in India is extensively practised in
(a) Kanara plains
(b) Deccan Region
(c) Coromandel plains
(d) Punjab plains
229: Assertion (A) :
The British sovereignty continued to exist in free India.
Reason (R) :
The British sovereign appointed the last Governor-General of free India.
In the context of the above two statements, which one of the following is correct ?
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
230: Which one of the following groups of plants was domesticated in the New World and introduced into the 'Old World'?
(a) Tobacco, cocoa and rubber
(b) Tobacco, cotton and rubber
(c) Cotton, coffee and sugarcane
(d) Rubber, coffee and wheat