Assertion (A): In a supersonic flow, the velocity increases as the area increases.
Reason (R): Conservation of masses, momentum and energy require that dA/A should increase with dV/V for M greater than unity.
1
A is true; R is true, and it explains A
2
A is true; R is true, but it does not explain A
3
A is true; R is false
4
A is false; R is true