1661: The substitution of steel for wooden ploughs in agricultural production is an example of
(a) labour-augmenting technological progress
(b) capital-augmenting technological progress
(c) capital-reducing technological progress
(d) None of the above
1662: In which organ of the human body are the lymphocyte cells formed?
(a) Liver
(b) Long bone
(c) Pancreas
(d) Spleen
1663: Though a few (gas-based) industries have already been established good reserves of natural gas in India remain unutilised. This vast resource of natural gas can be used in the production of
(a) fertilizers
(b) carbide
(c) graphite
(d) synthetic petroleum
1664: Which one among the following rivers is the longest?
(a) Lena
(b) Congo
(c) Amur
(d) Amazon
1665: 'Hand-in-Hand 2007', a joint anti-terrorism military training was held by the officers of the Indian Army and Officers of Army of which one of the following countries?
(a) Japan
(b) China
(c) Russia
(d) USA