In a triangle $PQR$,$\angle R = \frac{\pi}{2}$. If $\tan(\frac{P}{2})$ and $\tan(\frac{Q}{2})$ are the roots of the equation $ax^2 + bx + c = 0$ $(a \neq 0)$,then:

  • A
    $a + b = c$
  • B
    $b + c = a$
  • C
    $a + c = b$
  • D
    $b = c$

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