Which of these book-title pairs is incorrectly

 India and Bhutan signed ten MOUs in the field of space research, aviation, power and education.

Identify the form of each sentence given here from among the choices given below it:

Being innocent, he never thought of running away.

Select the correct active form of the given sentence .

This beautiful house has been built by Mohan.

Select the correct active form of the given sentence. 

They were refused entry in Delhi by the police.

Select the correct Passive form of the given sentence.

He drew a house in the morning.

Select the correct passive/active form of the given sentence.

There is an apportunity to gain 

Select the correct Active Voice form of the given sentence.

Has the car been cleaned by the driver?

Four sentences are given below. Find the odd sentence out.

Select the correct passive form of the given sentence. 

Somebody has already tipped the custom authorities about the drugs.