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10. At high altitude atmospheric pressure of oxygen is 250 mmhg partial pressure oxygen in blood is 5 mmhg, 50 mmhg, 100 mmhg--- Atm. Pressure X Fraction of O2 in air (21% = 250 X 21/100 = 52.5 (approx. 50mmHg)= 50 mmHg (answer) 11. Positive th BCG in all except. Previous vaccination, M tuberculosis, M leprae, M bovis--- M.Leprae 12. ................
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