What did cardiologist Dr. Paul Zoll invent in Massachusetts in 1952?


Options: EKG,    Artificial heart valve,    Artificial heart,    Pacemaker

Ans:D,D


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Asked in: KCC-2018   |   JOA 556-2018  |  HRTC JTO-2017

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Options: I, II,    I, III,    II, III,    All of the above

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Out of 900 reported species of living gymnosperms, conifers are represented by about 500 species, About 2,50,000 species of angiosperms (flowering plants) have also been reported in the world. The vast and dominant woodlands in Europe, Asia, North America and mountains such as Himalayas are wooded with
Options: all gymnosperms, except conifers,    only angiosperms,    only conifers,    angiosperms and all gymnosperms except conifers

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What is part of a database that holds only one type of information?
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