Which is the best institute to pursue ethical hacking course? What is its fee structure for 15 months?

Jetking is good but you may also go for distance learning because many reliable institutes provide courses in ethical hacking online, which is also level vise and little cheaper too. For the fee structure, you have to google it because it varies from institute to institute.

You can get into Jetking, and the fee structure changes from institute to institute. It is advised to check with the institute itself.