Yes, I would specify what you do even though if you choose "Computer, Mathematical and Information Technology, " you still will be correct.

What are the penalties if my wife was to give birth in the US while on vacation with a tourist visa?

Not a question for immigration lawyers to answer.

Which Visa type best suits my needs?

I would look at employment-based visas, such as H-1B.

E2 Visa

Yes, you should not have any problems entering and reentering with E2.

Do I have to wait for a while for reapplying i-130?

Why would you want to have it withdrawn? Later, you might have problems getting it processed and approved again.

It usually takes several months from the date of filing to receive EAU. I would say by August, you should have it. When you receive a green card,...

I married US citizen and now i m a green card holder

If you will take a job offer and stay outside of USA for 6 months, it might be considered that you abandoned your residency. It means no more green...

Am I eligible to get an annulment?

Your question has very little to do with immigration. I think it should be posted for family lawyers to answer.

To apply for E2, Can I lease an apartment instead of office for the new established business? (as part of business enterprise)

You should lease an office since leasing a residential apartment might well be considered to be a fraudulent activity on your petition.

Want to know processing time for spouse?

Approximate petition visa processing times are usually given on USCIS website.