Arrange the radioactive radiations in increasing order of their ionizing power and penetrating power.

• A
  Respectively $\gamma, \beta, \alpha$ and $\gamma, \beta, \alpha$
• B
  Respectively $\gamma, \beta, \alpha$ and $\alpha, \beta, \gamma$
• C
  Respectively $\alpha, \beta, \gamma$ and $\alpha, \beta, \gamma$
• D
  Respectively $\alpha, \beta, \gamma$ and $\gamma, \beta, \alpha$