In a line of boys, Kapil is 8th from the right and Nikunj is 12th from the left. When Kapil and Nikunj interchange their positions, Nikunj becomes 21st from the left. What will be the position of Kapil from the right?

• A.  8th                              
• B.  17th                
• C.         21st                
• D.         None of these