I want to hydrolyse the -cyno group selectively into the Amide as well as Acid functionality, I have already tried in Basic madium but no positive result.
I have recently cleaved nitriles under strong base and under strong acidic solutions. There are also options to react the nitrile directly to make amides using catalysis. Depending on your subsequent chemistry
You can hydrolyze -cyno group into the Acid using mineral acid by the procedure available in standard book like A Text book of practical Organic Chemistry by A.I. Vogel.