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In each of the following questions, a statement of Assertion (A) is given by corresponding statement of Reason (R). Of the statements, mark the correct answer as
(a) If both A and R are true and R is the correct explanation of A
(b) If both A and R are true, but R is not the correct explanation of A
(c) If A is true, but R is false
(d) If A is false, but R is true
Assertion (A) DNA has two chains having antiparallel polarity.
Reason (R) In one chain of DNA at one end has a free phosphate moiety 5^' end of ribose sugar and at other end the ribose has a free 3^'OH group.

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