CBSE 10th

Yes, you can go for merchant navy after class 10th. But, if you are married, you should not opt for merchant navy job, as it is not a permanent job. You can be fired any time. Merchant navy is a private job and the age criteria is between 17 years to 21 years.

Hi,
You can refer to this article for guidance https://www.shiksha.com/aviation/flying-pilot-training/articles/career-in-commercial-flying-all-you-need-to-know-blogId-13472.

Apply in IITs. You may land in one of them.

Yes, you can sit for CAT/MAT/XAT. Though, it is bit difficult to get seat in IIM Ahmedabad (as they focus on career), you can get admission into other good colleges.

No, that's not possible, minimum eligibility is 10+2, check out the details below:
https://www.shiksha.com/university/north-eastern-regional-institute-of-science-and-technology/nerist-entrance-exam.

Wright Brothers invented Aeroplane.

Hi Abhishek,
Firstly you need to apply for BIMM by filling application form. Then afterwards you need to appear for GD and PI process. Just do well in GD and PI, if performed well you can get admission in BIMM.

Definitely, you will get call from N. L. Dalmia Institute of Management Studies and Research.