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Get Answers to all your Questions
Incomplete combusting of coal and petroleum : (A) increases air pollution. (B) increases efficiency of machines. (C) reduces global warming. (D) produce poisonous gases. The correct option is :
Option: 1 (A) and (B)
Option: 2 (A) and (D)
Option: 3 (B) and (C)
Option: 4 (C) and (D)
Answers (1)
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