• Step 1: Calculate Available Water by Weight ($\Delta w$):

$$\Delta w = \text{Mass wetness at FC} - \text{Mass wetness at PWP} = 25\% - 5\% = 20\% = 0.20$$

• Step 2: Calculate Volumetric Water Content ($\Delta \theta$):

$$\Delta \theta = \Delta w \times \frac{\rho_b}{\rho_w} = 0.20 \times 1.2 = 0.24\text{ cm}^3/\text{cm}^3$$

• Step 3: Calculate Available Water Depth in 60 cm Soil Layer ($d$):

$$d = \Delta \theta \times \text{Depth} = 0.24 \times 60\text{ cm} = 14.4\text{ cm}$$

• Conclusion: The available water capacity is 14.4 cm. (Correct answer: Option 3)