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a
cytosine is a pyrimidine base
b
on hydrolysis, they yield a pentose sugar
c
pyrimidine contains ‘σ ’ & ‘π ’ bonds in the ratio 10 : 3.
d
nucleoside contains a phosphate in it.
answer is D.
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Detailed Solution
Chemical composition of Nuleoside :Suar + Base. A nucleoside consists of nitrogenous base covalently bonded to a sugarribose or deoxy ribose but without phosphate group.Nucleotide - phosphate = Nucleoside