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Option 4 : Grandfather
Preparing the family tree using the following symbols:
[ alt="Common Diagram 28.01.2020 D3" src="//storage.googleapis.com/tb-img/production/20/12/Common_Diagram_28.01.2020_D3.png" style="width: 208px; height: 280px;">
The possible tree diagram will be
[ alt="F1 Shashi 12-08-21 Savita D6" src="//storage.googleapis.com/tb-img/production/21/08/F1_Shashi_12-08-21_Savita_D6.png" style="width: 313px; height: 249px;">
Hence, Rao is the ‘grandfather’ of Rahul.
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