Which of these is having same value as Cpm?

1.	Which of these is having same value as C_pm?
A.	( frac{USL-LSL}{6 sqrt{ ^2-( -T)^2}} )
B.	( frac{USL+LSL}{6 sqrt{ ^2-( -T)^2}} )
C.	( frac{USL-LSL}{6 sqrt{ ^2+( -T)^2}} )
D.	( frac{USL+LSL}{6 sqrt{ ^2+( -T)^2}} )
Answer» D. ( frac{USL+LSL}{6 sqrt{ ^2+( -T)^2}} )

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