In a tetradynamous androecium,which of the following is observed?

• A
  Outer whorl of four smaller stamens and inner whorl of two larger stamens
• B
  Outer whorl of two larger stamens and inner whorl of four smaller stamens
• C
  Outer whorl of four larger stamens and inner whorl of two smaller stamens
• D
  Outer whorl of two smaller stamens and inner whorl of four larger stamens