The woman's 12-year-old daughter, who also consumed poison, has been admitted to a hospital, they said.
According to police, the woman had an argument with her husband last night related to the study of their son.
Following the argument, the woman left their place in Varbhata village along with her daughters and went to her relative's house in Salkhan, where they consumed poison.
When her relatives got to know about the incident, they rushed them to a hospital, where the woman and one of her daughters were declared brought dead.
Police are investigation the case.
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