Refer to the given dichotomous key and select the correct option.I. (a) It is categorised as energy giving food. - Go to II(b) It is categorised as protective food. - Go to IIIII. (a) It is soluble in water. - [P](b) It is insoluble in water. - [Q]III. (a) It is needed for clotting of blood. - [R](b) It helps in formation of haemoglobin. - [s]

• A. Q could be glucose which is instant source of energy.
• B. Deficiency of S causes anaemia characterised by pale body colour, body fatigue etc.
• C. R causes osteoporosis in adults while S causes goitre in adults.
• D. P occurs in the cell wall of plant cells and in fibres.