In the given fig. ABCD is a parallelogram. \[\text{DL}\bot \text{AB}\] and \[\text{DM}\bot \text{BC}\text{.}\] If AB = 18cm, BC = 12cm and DM = 10 cm. Find DL.

• A.  \[6\frac{1}{2}cm\]                
• B.  \[6cm\]
• C.  \[6\frac{2}{3}cm\]                
• D. None of these