1) classification of industries on the basis of- a) size and scale b) ownership c) raw materials d) all of the above 2) which of the following is not an industrial region a) mumbai-pune cluster b) guntur-visakhapatnam belt c) ahmedabad-baroda region d) bhopal-indore region 3) when did bhopal gas tragedy occur- a) 3 december 1984 b) 3 november 1977 c) 8 november 2020 d) 5 december 1922 4) which is known as the backbone of the industry a) iron and steel b) cotton textile c) none of these

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