Biology
A man whose blood group is not known meet with a serious accident and needs blood transfusion immediately. Which one of the blood group mentioned below and readily available in the hospital will be safe for transfusion

O, Rh+
O, Rh-
AB, Rh+
AB, Rh-

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Biology
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

all gymnosperms, except conifers
only conifers
only angiosperms
angiosperms and all gymnosperms except conifers

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