Option 3: 0.5 -> Price elasticity of demand is calculated using the formula: Ed = (% change in quantity / % change in price). Here, quantity changes from 30 to 24 (change = -6, so % change = -6/30 = -20%), and price changes from Rs. 10 to Rs. 14 (change = 4, so % change = 4/10 = 40%). Therefore, Ed = |-20%/40%| = |-0.5| = 0.5. This indicates inelastic demand since the elasticity is less than 1. -> correct