Subject :IMO Class : Class 8
Subject :IMO Class : Class 5
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Subject :IMO Class : Class 6
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Subject :IMO Class : Class 7
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Subject :IMO Class : Class 7
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Subject :IMO Class : Class 4
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Subject :IMO Class : Class 4
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Subject :IMO Class : Class 4
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Subject :IMO Class : Class 5
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Subject :IMO Class : Class 5
Ans 4:
Class : Class 5
Predecessor is one less than the given natural number.So take away one from the question. So the correct answer is A