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I do not know (a)/ what is he doing ? (...

I do not know (a)/ what is he doing ? (b)/ to solve the problem. ©/ No error (d)

लिखित उत्तर

Verified by Experts

The correct Answer is:
b

Is he' should be changed to 'he is ' to make the setence grammatically correct. ('is he' used in interrogative sentence)
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  3. I do not know (a)/ what is he doing ? (b)/ to solve the problem. ©/ N...

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  5. he took (a) down after (b)/ father. ©/ No error (d)

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  6. His honesty (a)/ has never been (b)/ called to question ©/ No error (d...

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  7. I see her (a)/ most weekends (b)/ but not very often between . ©/ No e...

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  8. The chancellor (a)/ was present (b)/ on both occasions ©/ No error (d)

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  9. The deliberations by (a)/ the committee (b)/ are completely econfident...

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  10. The pile of books (a)/ are (b)/ missing . ©/ No error (d)

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  11. Either he (a)/ or I (b)/ are wrong. ©/ No error (d)

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  12. Please (a)/ tell to him (b)/ to do his work . ©/ No error (d)

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  13. Though he is good (a)/ he is (b)/ miscfhievous ©/ NO error (d)

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  14. The thief (a)/ hit me (b)/ suddenly and hardly . ©/ No error (d)

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  15. The number of books (a)/ in our library (b)/ is less ©/ No error (d)

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  16. The general said (a)/ soldiers do not fire (b)/ till I will give the o...

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  17. Neither of the candidates (a)/ are (b)/ good ©/ No error (d)

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  18. The machine (a)/ is more efficient (b)/ than any other equipments in t...

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  19. The tin deposite in that area (a) / would probably be exhausted (b)/ i...

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  20. The operation of this machine (a)/ is different (b)/ to that of other ...

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