Which of the following leaf modifications occur(s) in the desert areas to inhibit water loss ? 1. Hard and waxy leaves 2. Tiny leaves 3. Thorns instead of leaves Select the correct answer using the code given below :

Option (d) is correct because xerophytes utilize all three adaptations—waxy coatings to prevent evaporation, reduced leaf size to limit surface area, and thorns to minimize transpiration—to conserve water in arid climates. Option (a) is the most tempting wrong choice for those who overlook that "hard and waxy" surfaces (sclerophylly) are primary structural defenses against water loss. The core concept being tested is xerophytic plant adaptations for moisture conservation.