Answer:
The correct answer is- Rationalization
Explanation:
Rationalization is a defense mechanism that involves the action to justify their unobvious behaviors by logical reasons to avoid true explanation. For example, if an employee is not given promotion might rationalize his disappointment by saying that he does not want extra responsibilities.
Rationalization may help the person to avoid guilt and maintain self-respect when he has done something wrong. Many times rationalization is not harmful to the person but if it becomes a habit of a person it can cause a problem for him and others. Therefore the correct answer is rationalization.
 
        
             
        
        
        
Answer: The image formed by a plane mirror can only be the same size as that of the object.
Explanation :
A plane mirror consists of a highly reflecting surface. This surface reflects a large portion of light. One of the surfaces is polished with red lead oxide. 
The image formed by the plane mirror is of the same size as that of the object. The distance between the object and the mirror is equal to the distance between the image and the mirror.
Out of given options, the correct one is (d) " The image can only be the same size as the object ".
 
        
                    
             
        
        
        
If you compare the original DNA with the mutated DNA, the first C got “substituted” by an A after the mutation.
So the answer is (C) substitution.