Final answer:
Myxoedema, which is associated with Hypothyroidism, is most commonly found in the extremities such as hands and feet, where skin can become thick, dry, and waxy.
Step-by-step explanation:
Hypothyroidism Myxoedema is commonly found in the tissue of the extremities, such as the hands and feet, as well as the face. In adults, hypothyroidism results in myxoedema, which involves symptoms like thick, dry, and waxy skin, as well as a dull mental ability and a high sensitivity to cold. The skin changes with myxoedema are due to the accumulation of mucopolysaccharides within the dermis which attracts water and causes swelling.
Looking at the provided options, the correct answer to the question 'Where is Hypothyroidism Myxoedema commonly found?' would be A) Extremities.