ABCD is a parallelogram on xy rectangular coordinate plane, three of the four vertices of parallelogram are (5,15) , (5,45) and (-5,15). Which can be the coordinate of fourth vertex?
Options:
A) (-5,-5)  B) (5,45)  C) (-5,-25)  D) (-5,10)  E) (15,25)
A(-5, 15)   (5,45)(5, 15)   C(5, 45)   X(-5, 45): Parallelogram=Square=AXC(5,45), where AX||C(5,45), AX=C(5,45), XC||A(5,45), XC=A(5,45)   Y(-5, 5): Parallelogram=AY(5,45)C, where AY||(5,45)C, AY=(5,45)C, AC||Y(5,45), AC=Y(5,45)   Z(15, 45): Parallelogram=ACZ(5,45), where AC||Z(5,45), AC=Z(5,45), CZ||A(5,45), CZ=A(5,45)   Ans:(5,45)
<result>B</result>
ABCD is a parallelogram on xy rectangular coordinate plane, three of the four vertices of parallelogram are (5,15) , (5,45) and (-5,15). Which can be the coordinate of fourth vertex?