From F-2 visa holder to F-1 visa holder

That is correct, he either must file for a change of status or depart the US to obtain a new F-1 visa overseas.

I'm in L2 EAD working with A, my H1 got approved recently from B. I got an offer from C. Can I transfer my H1 to C in Oct?

If you were selected in the recent H-1B visa lottery, then a new petition would not be subject to the H-1B cap from a new employer.

What is this meaning? Can I get my permanent residence ?

This means that the green card is being produced and will be mailed to you forthwith.

Yes, a green card holder parent can petition a single son or daughter.

What to do when my passport expires within 6 months and already applied for K1 visa?

Apply for a new passport ASAP and bring it to the interview, along with the cancelled passport.

I am applying for an adjustment to permanent resident status because:

The complete instructions for filing that application are available at www.uscis.gov.

Please, help! Is there a waiver for crimes involving moral turpitude in order to be granted a visa?

This person would have to apply for as waiver in conjunction with an application for a toursit or other nonimmigrant visa. The decision to grant...

Can an employee file H1B for me with expired F-1 visa

If you are out of status, you would need to depart the US to obtain a new nonimmigrant visa and status, even assuming you could obtain approval of...

130 approved, 485 pending.Travel on AP, have i over stayed my visa?

There would be no reason to maintain F-1 status if you have properly filed an I-485. based on all of your questions, you need to consult with an...

Can I interfile I-140 with and I-140 with earlier priority date?

Only your employer may file an I-140 on your behalf. You should be entitled to the earlier priority date of the two I-140s.