<prompt> Tachypnea in a 4-month-old child is respiratory rate more than30min40min50min60min  <response>: Ans, c 50min. Ref Nelson, 17th ed., 280 AgeHR per minBP mm HgRR per min1Premature120-17055-7535-4540-7020-3 months100-15065-8545-5535-5533-6 months90-12070-9050-6530-4546-12 months80-12080-10055-6525-4051-3 years70-11090-10555-7020-3063-6 years65-11095-11060-7520-2576-12 years60-95100-12060-7514-22812 years55-85110-13565-8512-10 