A 40 yr old male patient presented with mild abdominal pain, mild constipation with a feeling of incomplete evacuation and mucus in stools for the past 4 years. On examination, tenderness is present in left iliac fossa. The most likely diagnosis is:: (A) Ulcerative colitis, (B) Diverticular disease of the colon, (C) Irritable bowel syndrome, (D) Ca colon
Answer is C. None