The correct option is A ADH helps in water elimination making urine hypotonic.
ADH helps in water reabsorption in DCT and collecting duct making urine hypertonic. ADH is secreted by hypothalamus and released into the blood from the posterior lobe of pituitary gland. ADH is stimulated to be released when osmoreceptors in the hypothalamus detect an increase in the osmolarity of the blood above 300mOsmoIL−1.