यदि $\cos \alpha + \cos \beta = \frac{1}{3}$ और $\sin \alpha + \sin \beta = \frac{1}{4}$ है,तो $\cos (\alpha + \beta) = $

  • A
    $\frac{7}{25}$
  • B
    $\frac{12}{25}$
  • C
    $\frac{13}{25}$
  • D
    $\frac{24}{25}$

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