@bad attitude
As per the current rules, part 1 plus 5k gives u an rtr(c) for 20 years and 10k will get u a lifetime one.
As u said that, could you please confirm that if u clear part-1 and make a 10,000 DD will stand you a chance to get it for lifetime?, because, underneath the result issued by wpc, it says that only part-1 candidate will get it for 20 years( DD of 5000), and the ones who cleared full RT will get 2 options, either they go for 20 years (5000 DD) or they go for life time (10,000DD).
inshort is there anyway to get a lifetime(10,000 DD) after clearing part-1 only?