निम्नलिखित फलन का अवकलज ज्ञात कीजिए: $2 \tan x - 7 \sec x$.

  • A
    $2 \sec^2 x - 7 \sec x \tan x$
  • B
    $2 \sec^2 x + 7 \sec x \tan x$
  • C
    $2 \tan^2 x - 7 \sec x \tan x$
  • D
    $2 \sec^2 x - 7 \tan^2 x$

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