Consider two masses $m_1$ and $m_2$ connected through a pulley as shown in the figure. Mass $m_2$ starts from rest at height $h$ and falls down. With what speed does it hit the ground? (Assume no friction and massless strings and pulleys.)

• A
  $\sqrt{\left(\frac{m_2}{m_1+m_2}\right) g h}$
• B
  $\sqrt{2 g h}$
• C
  $\sqrt{\left(\frac{m_2}{m_1+m_2}\right) 2 g h}$
• D
  $\sqrt{\left(\frac{m_1}{m_1+m_2}\right) 2 g h}$