The respiratory problem common in smokers is______?
The respiratory problem common in smokers is______?
A. tuberculosis
B. Emphysema
C. Asthma
D. Cancer
A. tuberculosis
B. Emphysema
C. Asthma
D. Cancer
		A. The earth’s atmosphere
B. Interstellar dust
C. both A and B
D. None of these
The density of Air is_____________?
		A. 0.225 kg/m3
B. 1.025 kg/m3
C. 1.225 kg/m3
D. 1.425 kg/m3
		A. Rearing silk worms
B. Science of bee keeg
C. Science of gardening
D. Science of cultural norms and trends
A. Pacific Ocean
B. Indian Ocean
C. Arctic Ocean
D. None of the above