<prompt> The most impoant cause of under 5 moality worldwide is:DiarrhoeaMalnutritionRespiratory infectionsTrauma  <response>: Lower respiratory tract infections are the leading cause of morbidity worldwide between age group of 1 to 5. Other causes are, diarrheal illness, measles, malaria, human immunodeficiency virus infectionacquired immunodeficiency syndrome. At Ref: Goldman R.D., Meckler G.D. 2011. Chapter 110. Emergency Care of Children. In J.E. Tintinalli, J.S. Stapczynski, D.M. Cline, O.J. Ma, R.K. Cydulka, G.D. Meckler Eds, Tintinallis Emergency Medicine: A Comprehensive Study Guide, 7e. 