A health disorder that results from the deficiency of thyroxine in adults and characterized by (i) a low metabolic rate, (ii) increase in body weight and (iii) tendency to retain water in tissues is

Myxoedema (Gulls disease) occurs due to the deficiency of thyroxine in adults, it causes low BMR (by 30^ - 40%). Low body temperature, temdency to retain water in tissue, reduced heart rate, pulse rate, blood pressure and cardiac output, low sugar and iodine level in blood, muscular weakness and oedema (accumulation of interstitial fluid that causes the facial tissues to swell and look fluffy).
Decrease secretion of thyroxine hormone from thyroid gland causes hypothyroidism.
Simple goitre is caused by lower intake of iodine through diet.
Cretinism occurs due to hyposecretion of thyroxine during the growth years or birth