In each of the following questions, two statements are given; one in Assertion (A) column while ...

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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 (R) is not right explanation of (A).
(c) If (A) is right but \( (\mathbf{R}) \) is wrong.
(d) If both (A) and (R) are wrong.
(A) \( \rightarrow \) D-erythrose has non-superimposable mirror image hence is chiral.
(R) \( \rightarrow \) D-erythrose has plane of symmetry.
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