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17/10/2020 12:50 pm
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Iron and Steel industry requires Iron ore, coking coal and limestone in which of the following proportions?
(a) 2 : 3 : 1
(b) 4 : 2 : 1
(c) 1 : 2 : 3
(d) 2 : 3 : 4
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17/10/2020 12:51 pm
(d) 2 : 3 : 4