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In each of the following questions, two statements are given; one in Assertion (A) column while the other in Reason (R) column. Examine the statements carefully and mark the correct answer according to the instructions given below :
(a) If both (A) and (R) are right and (R) is right explanation of (A).
(b) If both (A) and (R) are right but \( (\mathbf{R}) \) is not right explanation of \( (\mathbf{A}) \).
(c) If (A) is right but (R) is wrong.
(d) If both (A) and (R) are wrong.
(A) \( \rightarrow \) D-glucose and D-mannose form same osazone with phenyl hydrazine.
(R) \( \rightarrow \) Osazone formation involves only the last four carbon atoms.
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