Sed /awk

Shell Programming and Scripting
1

I have a interesting problem,

The data is of the format
1,264,sjfgd,6738,jsfg
then there are certain bad records of the format
1,265,jsfgdh
These records are not complete ,I want to delete these records.

2 
awk -F, 'NF == 5' infile

perl -F, -ane 'print if ($#F + 1) == 5' infile