Directions: Read the passage given below and answer the following questions Cactus does not have broad leaves because broad leaves lose too much water. The leaves in a cactus are reduced to spines or thorns. The cactus stem instead, is green, thick and fleshy. The green stem carries out photosynthesis and stores water for the plant. Waxy layer on the stem helps to reduce loss of water. In cactus, photosynthesis is carried out by

• A. spines                         
• B. green stem    
• C. roots                           
• D. leaves