Diploma

You can directly apply for BE after class 12th science, you just need to give engineering entrance exam like JEE CET and can take admission for BE.
If you are planning for Diploma, then you will get admissions for diploma for 2nd year on your class 12th basic.

Yes you very much are eligible for that after your UG there isn't a bar. But is it diploma or Post gradate diploma do specify.

Diploma in Graphic Design is a 1-year Diploma level programme in equipping the knowledge of multimedia, Animation and building Games applying the use of graphics. The eligibility of which is to complete the 10+2 examination or an equivalent examination in any relevant stream or from a recognized uni

Sorry Jaydev, you're not eligible to get admission in CSE at St Andrews college because you've completed your Diploma in civil engineering, so you must choose B.Tech CivIl in B.Tech.
There is no chance of getting CSE.
Students should take the branch in which they have completed Diploma, it's the rule.

Yes, there is an entrance exam to enter B.Tech after diploma i.e. CET . Students must qualify the exam to enter B.Tech with Scholarship. And, if you won't appear for the exam, you’ll not eligible to get Scholarship/ fee reimbursement advantages.

Please read this Shiksha.com article for all the event management Institutes in Gurugram, https://www.shiksha.com/hospitality-travel/event-management/colleges/colleges-gurgaon.

No, you need to have completed 10+2. Course Fee is between INR 50,000 to 1 lakhs.
Diploma in Food and Beverage Services is a course that train students in the basics of restaurant cooking and baking, food safety procedures and nutrition. Students also gain some knowledge in business management like

For a good placement, you can go either with M.Sc in clinical research or M.Sc in Microbiology, as both of them are promising fields. As microbiology is having placements in industrial fields, whereas clinical research has placements in clinical labs. So, you can choose any one but don't go for Dipl

Average Course Fee is INR 5000 to INR 5 Lacs
For more detailed information, please visit the below Shiksha link:
https://www.shiksha.com/college/pixel-institute-of-photography-paschim-vihar-Delhi-62005