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41 . Which one of the following is not a rabi crop?
A. Mustard B. Rice
C. Wheat D. Gram

42 . The golden fibre of India is-
A. Cotton B. Hemp
C. Jute D. Silk

43 . Chemical formula for water is
A. H2O B. CaSiO3
C. Al2O3 D. NaAlO2

44 . Which of the gas is not known as green house gas?
A. Methane B. Hydrogen
C. Carbon dioxide D. Nitrous oxide

45 . The gas usually filled in the electric bulb is
A. nitrogen
B. carbon dioxide
C. hydrogen
D.
oxygen




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