Which of the following statements is correct?

• A
  In a primary rainbow,the observer sees red colour on the top and violet on the bottom.
• B
  In a primary rainbow,the observer sees violet colour on the top and red on the bottom.
• C
  In a primary rainbow,the light wave suffers total internal reflection twice before coming out of the water drops.
• D
  $A$ primary rainbow is less bright than a secondary rainbow.