This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable Diseases, Subject name: Social & Preventive Medicine
Cat 1 TB treatment - 
Select and explain. 
A. HRZE, B. HRE, C. ZRE, D. HRZES
A: HRZE
Answer: A: HRZE 
Explanation: Ans. is 'a' i.e., HRZE o Category ICategory IICategory III# Sew sputum smear positive# Seriously ill sputum smear negative.# Seriously ill extra pulmonary# Sputum smear positive relapse# Sputum smear positive failure.# Sputum smear positive t/t after default# Sputum smear negative not seriously ill# Extra pulmonary not seriously illTT2(HRZE)i + 4<HR)3T/T - 2(HRZES)3 + (HRZE), + 5(HRE),TT - 2 (HRZ)3+4(HR)3