[tex]\huge \bf༆ Answer ༄[/tex]
Here's the solution ~
[tex]\qquad \looparrowright \sf{3 \sqrt{128 {x}^{4} {y}^{2} } }[/tex]
[tex]\qquad \looparrowright \sf 3 \sqrt{2 {}^{7}{ {x}^{4} {y}^{2} } } [/tex]
[tex]\qquad \looparrowright \sf3 \times 2 {}^{3} \times {x}^{2} \times y \times \sqrt{2} [/tex]
[tex]\qquad \looparrowright \sf24 {x}^{2} y \sqrt{2} [/tex]
Therefore, the correct choice is ~ B
