Which algebraic expression correctly represents the statement twice the number \[\] subtracted from one ?half the product of\[x\]and\[y\]?

• A.  \[\frac{xy}{2}=2\]       
• B.  \[\frac{xy}{2}-2\]     
• C.  \[2xy-\frac{}{2}\]  
• D.  \[\frac{}{2}-2xy\]