It is a simple question of NSO Class 6 Set A. It means that the lady to whom Abhinav is pointing is his father's sister or Abhinav's aunt. The mother of Abhinav's father or Abhinav's aunt is his grandmother.
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Anviksha Vipassana answered this
Answer is grandmother because his fathers mother is grand mother so if he has any brother or sister theywill have the same mother.
