I have attached an image of the questions I want the answer for. I tried a lot but couldn't get. Basically the problem is I have entrance exam on 5th april and this is the sample paper. Since our syllabus changed therefore many of the questions we can't do.

Hope people can help here.

Here are my queries:

In Q.27. I want to know how to do it the answer is c and d. (I have the answer key with me.)

In Q.28. is the c) part correct? If yes how?

In Q29. how is the d) part correct?

In Q30. I don't know how to do this question at all never saw this question before. If anyone can explain this please surely do.

In Q32,33,34 How to do them also...

I know these are many questions but even if someone can solve any of them it would be really a great help .

I know they should be to their respective threads but it would have taken a lot of time so I apologize for that.