## Discussion Forum

Que. | An expression in the domain relational calculus is of the form |

a. | {P(x1, x2, . . . , xn) | < x1, x2, . . . , xn > } |

b. | {x1, x2, . . . , xn | < x1, x2, . . . , xn > } |

c. | { x1, x2, . . . , xn | x1, x2, . . . , xn} |

d. | {< x1, x2, . . . , xn > | P(x1, x2, . . . , xn)} |

Answer:{< x1, x2, . . . , xn > | P(x1, x2, . . . , xn)} |