MCQ

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In the relation:
$y=a \sin (\omega t-K x)$,
the dimensional formula for K is:

• A
  $\left[ M ^0 L^{-1} T^{-1}\right]$
• B
  $\left[ M ^0 LT \right]$
• C
  $\left[ M ^0 L^{-1} T^0\right]$
• D
  $\left[ M ^0 LT ^{-1}\right]$