IIM Ahmedabad - Indian Institute of Management

Yes, it is. The Rajiv being that IIMs don't consist only CAT scores for admission, they also look at your profile, which includes tenth and twelfth marks, work experience, etc.
Even the leads to only an interview call, post which you need to Crack the interview and HD (if there)

around 15-16 lakh per/annum

You try to explore your job opportunities with your MCA, as it is a good qualification. You can try for MBA, after joining job.

Students after completing graduation can immediately join PGDM program of IIM – Ahmadabad, if they get admission. So, don't worry about work experience. All you need is to perform in PGDM program and then interviews of companies coming to campus. If you perform, nothing else you should get worried a

I don't think that you will get admission on this profile and CAT score. If you're from any reserved category then it might be possible otherwise NO.

I dont think so.You should focus on M.Pharma job.

It depends upon which type of institute that you would like to join. Do you want to join CAT score Basis/ or MAT score basis or XAT score basis or statewise common entrance tests etc. You have to opt accordingly. Mostly CAT based organizations get good companies good packages etc.,

Mostly. No chances. IIM Ahmedabad has a minimum criteria for the average of tenght. A few twelfth percentage which I think is 80% for general category. Bit lower for reservation categories.

There are no courses to become a CEO. You don't directly get hired as a CEO. You have to earn your way up to it, and that depends on how you work in your career.