Introducing Raveena, Nitish said, “She is the maternal grandmother of my sister’s son”. How is Raveena related to Nitish?

Introducing Raveena, Nitish said, "She is the maternal grandmother of my sister’s son". How is Raveena related to Nitish?
QuestionIntroducing Raveena, Nitish said, “She is the maternal grandmother of my sister’s son”. How is Raveena related to Nitish?
Typemultiple_choice
OptionSister-in-law .incorrect
OptionMaternal aunt.incorrect
OptionMother-in-law.incorrect
OptionMother.correct
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