Identify the wrong statements about human excretory system and choose the correct option accordingly:  I. Kidneys are reddish brown and bean-shaped structure, II. Kidneys are situated between the last thoracic and third lumber vertebra, III. Each kidney of an adult human measures 10-12 cm in length, 5-7 cm in width, 2-3 cm thickness, and average weight 120-170 gram.