1.

A:CN^(-) is an acid ligand. R: CN^(-) accepts electron pair also.

Answer»

 If both Assertion & REASON are TRUE and the reason is the correct EXPLANATION of the assertion, then MARK (1) 
 If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2). 
) If Assertion is true statement but Reason is false, then mark (3).
 If both Assertion and Reason are false statements, then mark (4)

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