Answer:
Option B is correct.
Step-by-step explanation:
Given Expression is [tex]\sqrt{72}-\sqrt{8}+\sqrt{128}[/tex]
Simplify the given expression,
72 = 2 × 2 × 2 × 3 × 3         ⇒ √72 = 6√2
8 = 2 × 2 × 2                ⇒ √8 = 2√2
128 = 2 × 2 × 2 × 2 × 2 × 2 × 2  ⇒ √128 = 8√2
⇒  [tex]\sqrt{72}-\sqrt{8}+\sqrt{128}=6\sqrt{2}-2\sqrt{2}+8\sqrt{2}[/tex]
  [tex]=12\sqrt{2}[/tex]
Therefore, Option B is correct.
