Black values change in pdf exports
I am making a pdf file from Illustrator file in which black values should be
c=0, m=0, y = 0, k=100. When I save the pdf file, it shows up with the same colour values in illustrator. However in Adobe acrobat, the values change to c=69, m=67, y = 64,k=74
I even tried it from scratch by making a new CMYK file from illustrator menu then saving the file but still the issue remains.
I tried the following two settings one by one for each pdf
1. No conversion. Include all RGB and tagged CMYK profiles.
2. Convert to destination. US web coated SWOP v2, Document CMYK. 

