यदि $\alpha$ और $\beta$ प्रथम चतुर्थांश में ऐसे कोण हैं कि $\tan \alpha = \frac{1}{7}$ और $\sin \beta = \frac{1}{\sqrt{10}}$,तो $\alpha + 2\beta =$ ($^{\circ}$ में)

  • A
    $30$
  • B
    $45$
  • C
    $75$
  • D
    $90$

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