Q. Which statement is true regarding defecation?

(a)The Gastro iliac reflex stimulates the mass peristaltic movements on the colon to distend the rectum containing faces
(b)The Stretch receptors in the Wall of the rectum that is stimulated by faces with set the defecation reflexes
(c) Distended rectum will stimulate the pudendal nerve to cause the relaxation of the external anal sphincter
(d) The faces in the rectum is expelled when the internal and external sphincters are both relaxed voluntarily