Which word is spelled incorrectly?

1.Choose the correct sentence –

2.The antonym of '$Diligent^{\prime} is$ –

3.Even though he is a learned person, he talks nonsense When it comes to morality and integrity. The underlined portion refers to –

4.The functions of prepositional phrase are as _____

5.If you ___ (study) harder, you would be reveling in your vacation now.

6.The pair of words similar to Vaccination : Disease is -

7.I need ___ advice on how $\to deal with this$ situation, so I will talk to___ expert.

8.Transforming affirmative into negative sentence, the word '$must^{\prime} should be changed with -$

9.The main topic of the passage is ____

10.How does the body react to the influenza virus?

11.Which of the following verbs can be changed into passive voice?

12.Select the correct indirect speech of- He said, “Good bye, my friends.”