Consider the flow over the airfoil. Look at the next statements:

With increasing Reynolds number:

A) The boundary layer thickness decreases while the transition location moves backwards
B) The transition location moves forward while the drag increases
C) The transition location moves forward while the drag decreases
D) The boundary layer thickness decreases while the transition location moves forward.
Which option is correct?

1 - both A & D are false
2 - both A & C are false
3 - both C & D are true
4 - both B & D are true

The correct option is 2 - both A & C are false.

4 - both B & D are true.