766: Three communicable diseases prevalent in developing countries caused by unsafe drinking water and bad sanitation are
(a) acute diarrhoea, cancer and gout
(b) malaria, acute diarrhoea and schistosomiasis
(c) onchocerciasis, leukaemia and arthritis
(d) rheumatism, malaria and AIDS
767: Which one of the following does not contain silver?
(a) German silver
(b) Lunar caustic
(c) Horn Silver
(d) Ruby silver
768: When iron rusts, the weight:
(a) Increases
(b) Decreases
(c) Remains the same
(d) First increases then decreases
769: Which of the following were the aims behind the setting up of the World Trade Organization (WTO) ?
I. Promotion of free trade and resource flows across countries.
II. Protection of intellectual property rights.
III. Managing balanced trade between different countries.
IV. Promotion of trade between the former East Block countries and the western world.
Select the correct answer by using the codes given below :
Codes :
(a) I, II, III and IV
(b) I and II
(c) II and III
(d) I and IV
770: Which of the following can be said as the 'Theory of Darwin'
(a) Survival of the fittest and struggle for existence
(b) Weak and strong always maintain a fixed proportion
(c) Different species do not arise by genetic mutation
(d) None of these