291. AIDS is caused by HIV that principally infects:

A all lymphocytes
B activator $$B$$ cells
C cytotoxic $$T$$ cells
D $${T_4}$$ lymphocytes
Answer :   $${T_4}$$ lymphocytes
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292. In India human population is predominantly influenced by

A Colder environment
B Availability of Transport
C Availability of water
D Scoio- cultural factors
Answer :   Scoio- cultural factors
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293. Surgical removal of thymus of a new born shall result in failure to produce

A Monocytes
B B-lymphocytes
C T-lymphocytes
D Basophils
Answer :   T-lymphocytes
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294. Which is mental disorder

A Tetanus
B Neurosis
C Drug dependence
D Alcoholism
Answer :   Neurosis
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295. Addiction of tobacco is due to

A Histamine
B Nicotine
C Cocaine
D Caffeine
Answer :   Nicotine
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296. Colour processing center in brain can be located by

A C.T.Scan
B P.E.T. Scan
C M.R.I.
D All of the above
Answer :   P.E.T. Scan
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297. The carcinogenic ingredient of tobacco smoke is

A Nicotine
B Polycyclic aromatic hydrocarbon
C Carbon monoxide
D Tar
Answer :   Polycyclic aromatic hydrocarbon
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298. Dengue fever is transmitted by

A Aedes aegypti (Tiger mosquito)
B Culex fatigaus
C Anopheles
D Aedes donovoni
Answer :   Aedes aegypti (Tiger mosquito)
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299. Which one of the following diseases is now considered nearly eradicated from India ?

A Plague
B Kala azar
C Small pox
D Poliomyelitis
Answer :   Small pox
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300. Which of the following part of human body exhibits regeneration

A Spleen
B Kidney
C Brain
D Liver
Answer :   Liver
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