question_answer

The angle between the straight lines \[\frac{x+1}{2}=\frac{y-2}{5}=\frac{z+3}{4}\] and \[\frac{x-1}{1}=\frac{y-2}{2}=\frac{z-3}{-3}\]

A)  \[45{}^\circ \]                         

B)  \[30{}^\circ \]

C)  \[60{}^\circ \]                         

D)  \[90{}^\circ \]

E)  None of these