MCQ
$Ed = ......$
- ✓$\frac{\Delta\text{Q}}{\Delta\text{P}}.\frac{\text{P}}{\text{Q}}$
- B$\frac{\Delta\text{P}}{\Delta\text{Q}}.\frac{\text{Q}}{\text{P}}$
- C$\frac{\Delta\text{P}}{\Delta\text{Q}}.\frac{\text{P}}{\text{Q}}$
- D$\frac{\Delta\text{Q}}{\Delta\text{P}}.\frac{\text{Q}}{\text{P}}$