Hello aspirant!

There are many reservation categories in Karnataka. These categories were originally created to help poor and underprivileged.

As per your question 1G stands for 1 general that means people who do not live in rural area or are from a High caste.

1r stands for 1 rural that means people who are from rural area or lower caste.

1k stands for 1 Kannada that means people who lives in Kannada.

These categories are based on caste and quotas and cut-off is based upon the categories.

So now you can verify, to which category you fall under. Visit the link given below for your further references.

https://www.google.com/amp/s/engineering.careers360.com/articles/kcet-reservation-criteria/amp

Hope this helps you!

Best of luck!