If $y = (\sin^{-1} 2x)^2 + (\cos^{-1} 2x)^2$,then $(1 - 4x^2) y_2 - 4x y_1 = $

  • A
    $0$
  • B
    $4$
  • C
    $16$
  • D
    $12$

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