The unofficial answer key and solutions for all the subjects of the recently concluded K-CET exams for the year 2011 have been released by Expert Results. The official key by the CET cell would be out on May 1st. The links for the same is given below. Also note that the results would be out on May 30th.
The official answer key for the Karnataka CET exams held on 27th and 28th of April have been relaesed by the KEA people. It is accessible on their site:You can check the answer for any set(i.e A1 through D4) using the following links but if you want solutions for all the questions then please refer the above sites.
Also, you can now estimate your KCET rank against your marks using this KCET 2011 rank predictor tool.