You have stated different facts in a subsequent posting -
"A--------B---------C---------D A Great grand father, B= grandfather, C= father, D= son A died intestate and had self acquired property, B alive, C alive, D alive 1. Whether property status is self acquired or ancestral? 2. There is talk of four generations here and property is undivided upto 4 generations. am i right? 3. If it is not an ancestral property then how can it become an ancestral property?"
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Your profile suggests that you are setting question papers for us and subsequently improving them into riddles.