Here goes the process. We have PDFs generated using an application which need to be printed using a CMYK printer.
But Given that the PDF generated has RGB profile by default, the colors that appear on the hardcopy are different that those existing(Grey on softcopy turns Pink on Hardcopy)
So when we tried to set options in Adobe Acrobat PDF reader
setting the Conversion profile to Photoshop5CMYK.icc gave us the required color post printing