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