Subject :IEO Class : Class 5
Subject :IEO Class : Class 7
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Subject :IEO Class : Class 10
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Subject :IEO Class : Class 3
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Subject :IEO Class : Class 3
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Subject :IEO Class : Class 7
Ans 3:
Class : Class 7
the option is wrong , the scientist is singular so it will be HAS BEEN not HAVE BEEN. Pls correct the error sof.
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Subject :IEO Class : Class 7
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Subject :IEO Class : Class 7