If a vector \[\overrightarrow{P}\] making angles a, b, and g respectively with the X, Y and Z axes respectively. Then \[{{\sin }^{2}}\alpha +{{\sin }^{2}}\beta +{{\sin }^{2}}\gamma =\]

• A.                                                                      0     
• B.             1
• C.             2     
• D.              3