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  1. Which of the following is used to denote the selection operation in relational algebra ?
    2. A.
    Pi (Greek)
    B.
    Sigma (Greek)
    C.
    Lambda (Greek)
    D.
    Omega (Greek)

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    Answer : Option B

    Explanation :

    Sigma (Greek)

    The select operation selects tuples that satisfy a given predicate.

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