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Which of the following called innate immunity?
a) first line of defense
b) second line of defense
c) third line of defense           
d) all of these


Which of the following is/are called immune system?
a) first line of defense
b) second line of defense
c) third line of defense         
d) all of these


Which of the following comprising first line of defense?
a) skin
b) sweat
c) HCl
d) all of these


Which of the following make/s the second line of defense?
a) complement system                       
b) phagocytes and NK cells
c) fever and inflammation
d) all of these


Which of the following type/s of blood cell/s is/are phagocytes?
a) macrophages          
b) neutrophils
c) lymphocytes           
d) both a and b


Macrophages are derived from…..
a) monocytes             
b) neutrophils
c) lymphocytes           
d) both a and b


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