81. Night blindness is caused by a lack of which vitamin?
(a) Vitamin A
(b) Vitamin B
(c) Vitamin C
(d) Vitamin D

 

82. Alzheimer’s disease in human beings is characterized by the degeneration of:
(a) Liver cells
(b) Nerve cells
(c) Skin cells
(d) Bone cells

 

83. What is H5N1?
(a) Virus
(b) Bacteria
(c) Vaccine
(d) Fungi

 

84. Alzheimer’s disease in human beings is characterized by:
(a) Loss of sight
(b) Loss of memory
(c) Physical inability
(d) All of the above

 

85. Disease known as “break-bone fever” is:
(a) Malaria
(b) Cholera
(c) Dengue
(d) None of the above

 

86. Which is a hereditary disease?
(a) Polio
(b) Hemophilia
(c) Myopia
(d) None of the above

 

87. Cholera is caused by:
(a) Bacteria
(b) Virus
(c) Protozoa
(d) All of the above

 

88. A caries specialist is known as:
(a) Predicator
(b) Doughtiest
(c) Physician
(d) Dentist

 

89. Bipolar psychological disorder means:
(a) Psychosis disorder
(b) Nervous disorder
(c) Both a and b
(d) None of the above

 

90. Which of the following diseases is not caused by bacteria?
(a) Typhoid
(b) Tuberculosis
(c) Cholera
(d) All of the above