Somu with 68000 rank in WBJEE under the general category, you won't be able to government colleges which are good in placements and also in term of ROI. Still, you can get admission in the some of the private colleges which I am mentioning below:

• Abacus Institute of Engineering & Management
• Aryabhatta Institute of Engg. & Management
• Bengal College of Engineering and Technology
• Bengal College of Engineering, Durgapur
• Bengal Institute of Technology
• Calcutta Institute of Engineering & Management
• Camellia Institute of Technology & Management
• Durgapur Institute of Advanced Technology & Management
• Future Institute of Engineering and Management
• Global Institute of Management and Technology
• Haldia Institute of Technology
• JIS College of Engineering
• JLD Engineering and Management College
• Narula Institute of Technology
• Siliguri Institute of Technology
• Techno India Durgapur

And to find out  more colleges in which you are eligible you can check out the link mentioned below:

• https://engineering.careers360.com/wbjee-college-predictor

If you want to know in detail about the placement scenario of any college then you can ask for the comment I will give you an answer in detail.

Feel free to ask if you have any more queries. All the best!!