Which one of the following statements does not hold true when two balls of masses $m_1$ and $m_2$ undergo an elastic collision?

• A
  When $m_1 \ll m_2$ and $m_2$ is at rest,there will be maximum transfer of momentum.
• B
  When $m_1 \gg m_2$ and $m_2$ is at rest,after collision the ball of mass $m_2$ moves with four times the velocity of $m_1$.
• C
  When the collision is oblique and $m_2$ is at rest with $m_1 = m_2$,after collision the balls move in opposite directions.
• D
  $(b)$ and $(c)$ both.