Arrange the following in ascending order: \[\mathbf{XI},\text{ }\mathbf{IX},\text{ }\mathbf{IV},\text{ }\mathbf{VI},\text{ }\mathbf{XX}\]

• A.  \[IV<VI<IX<XI<XX\]
• B.        \[XX<IV<VI<IX<XI\]
• C.  \[XKXX<IV<VKIX\]           
• D.  \[IX<IV<VKXKXX\]
• E.  None of these