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Identify the incorrect statement for a m...

Identify the incorrect statement for a moving body
A) if its speed changes , its velocity must change and it must have some acceleration
B) if its velocity changes , its speed must change and it must have some acceration
c) if its velocity changes, its speed may or may not change , and it must have some acceration
d) if its speed changes but direction of motion does not change , its velocity will definitely change

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