Assuming that air contains 23 percent by weight of oxygen. Calculate the volume of air at NTP required for the complete combustion of 1kg of coal containing 90percent carbon and 5percent hydrogen (density of air=1.296gm/litre at NTP)

- "the acute form of diverticulitis can manifest itself with one or more severe attacks of infection and inflammation.

the inflammation of diverticulitis can eventually result in a bowel obstruction, which may cause constipation, thin stools, diarrhea, abdominal swelling or bloating, and abdominal pain."

a is the correct answer