If the side of a chess board is smaller than its perimeter by 42 cm then find the area of the chess board.

• A. \[100c{{m}^{2}}\]      
• B. \[144c{{m}^{2}}\]
• C. \[196c{{m}^{2}}\]   
• D. \[180m\,c{{m}^{2}}\]
• E. None of these