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All Subjects
CSS
CSS MPT
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CSS Past Papers
Past Papers
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Departmental Past Papers
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Subject:
Biology
Which are the four most abundant elements in living cells ?
A.
a. carbon, oxygen, nitrogen, sulfur
B.
b. carbon, oxygen, hydrogen, nitrogen
C.
c. carbon, oxygen, sulfur, phosphorus
D.
d. carbon, sulfur, hydrogen, magnesium
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