I got 38 marks in COMEDK but got 1 lakh rank. How is it possible, and is there any college that I can get with this rank?

Yes, it's possible to get a rank of 1 Lacs in COMEDK despite getting 38 marks. Here's some related information about COMEDK UGET: 

A score of 140+ is considered good, and a rank between 1-2000 is considered excellent. 

A score of 110+ is also considered good, and results in a rank between 2000 and 150

But for COMEDK, rank can be achieved with 38 marks itself, as the rank is applicable with the performance of all candidates and the marks distribution might be varying largely. A 1 Lacs rank means that many other candidates have scored better than you, so your marks are relatively lower in compariso