The correct option is A Excess of STH
Excess secretion of Somatotrophic hormone (STH) by the pituitary gland causes Acromegaly.
Deficiency of thyroxin causes cretinism in infants and myxoedema in adults where as excess of thyroxin results in Graves’s disease and Goitre. Excess of adrenalin does not cause any disorder.