I have secured rank 5200 (OBC) in UPSEE 2019,in which prestigious colleges of UP I'll be recommended for CSE or IT??

Based on your rank you can get some Government and private Colleges. As you have mentioned your general rank. As counselling is done on the basis of the general rank. So according to cutoff you can get these Colleges. These are the government Colleges where you can get admission are:
1. Chhatrapati Shahu Ji Maharaj University Kanpur
2. Lucknow University
3. Bundelkhand University Jhansi
4. Rajkiya Engineering College Sohnbhadra
You can get private Colleges also. These are the private Colleges where you can get admission:
1. Krishna Engineering College Ghaziabad
2. Inderprastha Engineering College Ghaziabad
3. IIMT Engineering College Greater Noida
4. ITS Engineering College Greater Noida
5. Sharda University Greater Noida
6. Amity School of Engineering Noida
These are the private Colleges where you can get admission based on your rank. As it depends on the cutoff list. As it vary from year to year. It depends on the number of students appeared in the exam and the level of paper whether it is easy, moderate or difficult. You can also come to know about these Colleges by visiting their respective websites.