If my sibling who is a US Citizen applies for my parents LPR/GC I have the following questions where I need your help & guidance 1) After the GC is approved how long can the parents delay entering USA (they are in India and when we apply they prefer to be in India)? 2) After they come to stay here as LPR can they legally be out of USA on Advance Parole for a reason and if the answer is yes for how long can they be possibly out? 3) When do they become US Citizen or can apply for being a USC? 4) Once they become USC can they live between India and US (say 6 months each) or there are restrictions? 5) For Siblings to gain a LPR via a Citizen Sibling what is the average wait time for Indians? Thank you Ron in advance.