The lead angle of a worm is \[22.5{}^\circ .\] Its helix angle will be:

• A. \[22.5{}^\circ \] 
• B. \[45{}^\circ \]   
• C. A\[\to \]4, B\[\to \]1, C\[\to \]3, D\[\to \]2
• D. \[90{}^\circ \]