Four circles of radius 1 cm each are placed in such a way on a plane paper that each touches the other. Find the area \[\pi {{r}^{2}}\] of the space left in between the four circles. \[2\pi {{r}^{4}}\]

• A. 0.82                            
• B. 0.84
• C. 0.86    
• D. 0.88