यदि $y = \frac{1}{4}u^4$ और $u = \frac{2}{3}x^3 + 5$ है,तो $\frac{dy}{dx} = $

  • A
    $\frac{1}{27}x^2(2x^3 + 15)^3$
  • B
    $\frac{2}{27}x(2x^3 + 5)^3$
  • C
    $\frac{2}{27}x^2(2x^3 + 15)^3$
  • D
    इनमें से कोई नहीं

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