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81. 

If force is expressed in Newton and the distance in metre, then the work done is expressed in
A. Joule
B. किलो गुम्मट
C. किलो मीटर गुम्मट
D. वाट
82. 

How many teeth does a normal adult dog have?
A. 32
B. 34
C. 38
D. 42
83. 

How many red blood cells does the bone marrow produce every second?
A. 5 million
B. 7 लाख
C. एक करोड़
D. 12 लाख
84. 

How many times has Brazil won the World Cup Football Championship?
A. Four times
B. दो बार
C. पांच गुना
D. एक बार
85. 

If speed of rotation of the earth increases, weight of the body
A. increases
B. कुछ नहीं बदला है
C. कम हो जाती है
D. कमी या वृद्धि हो सकती है