Diploma

You should go for Diploma in aviation in this you will learn about in flight work and ground staff work. Or it's better to do degree rather than Diploma from some good universities where you can get placement.

In dioloma aviation and hospitality you will also get a chance to learn about hotels and tourism
But in airport management you can only learn about aviation industry.

Prefer to do 3 years Diploma in Agriculture because 3 years course covers the more syllabus and Industries interactions also while two years does not. Further 3 years Diploma will make you eligible for the admission in B.Sc. Hons. Agriculture course also.