Consider the following statements:
1. Static pressure increases
2. Stagnation pressure decreases
3. Static temperature increases
4. Stagnation temperature decreases
Which of the above statements are correct for change in properties across normal shock wave?
(A) 1 and 3 only (B) 1, 2 and 4 only
(C) 1, 2 and 3 only (D) 1, 2, 3 and 4