If the co-ordinates of the points \[A,B,C\]be \[(-1,\,3,\,2),\,\,(2,\,3,\,5)\] and (3, 5,?2) respectively, then \[\angle A=\]

If the co-ordinates of the points \[A,B,C\]be \[(-1,\,3,\,2),\,\,(2,\,

1.	If the co-ordinates of the points \[A,B,C\]be \[(-1,\,3,\,2),\,\,(2,\,3,\,5)\] and (3, 5,?2) respectively, then \[\angle A=\]
A.	\[0{}^\circ \]
B.	\[45{}^\circ \]
C.	\[60{}^\circ \]
D.	\[90{}^\circ \]
Answer» E.

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If the co-ordinates of the points \[A,B,C\]be \[(-1,\,3,\,2),\,\,(2,\,3,\,5)\] and (3, 5,?2) respectively, then \[\angle A=\]

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