Answer: Option (c) is correct.
Step-by-step explanation:
The short run Phillips curve represents the trade off between unemployment and inflation. This means that if there is an increase in the inflation rate then as a result unemployment rate decreases and if there is an increase in the unemployment rate then as a result inflation rate decreases. There is an inverse relationship between unemployment and inflation rate.
The long run Phillips curve is a vertical line which is at a point of natural rate of unemployment and short run Phillips curve is L-shaped.