A doctor advises a patient to take plenty of citrus fruits, guavas, tomatoes and amlas over a period of two months regularly. What do you think is the complaint of the patient? (a) Softness and pain in bones, bending of vertebral column (b) Gums spongy, swollen and bleed easily (c) Blurred vision, burning and dryness of eye and tongue, cracking of skin of angle of mouth (d) Extreme weakness, swelling and pain in legs, loss of appetite, headache