Concept:Trace family relations step by step from given statements.Explanation:Moni is daughter of Sheela.Sheela is wife of my wife's brother.My wife's brother is my brother-in-law.So Sheela is the wife of my brother-in-law, making her my sister-in-law.Moni is the daughter of my brother-in-law and his wife Sheela.Therefore, Moni is my niece (daughter of my sibling by marriage).Answer:Niece