A query in the tuple relational calculus is expressed as:a) {t | P() | t}b) {P(t) | t }c) {t | P(t)}d) All of the mentioned Which of the following best describes the query?

• A. {t | P() | t}b) {P(t) | t }c) {t | P(t)}d) All of the mentioned Which of the following best describes the query?a) Finds the names of all instructors whose department is in the Watson building
• B. {P(t) | t }c) {t | P(t)}d) All of the mentioned Which of the following best describes the query?a) Finds the names of all instructors whose department is in the Watson buildingb) Finds the names of all department is in the Watson building
• C. {t | P(t)}d) All of the mentioned Which of the following best describes the query?a) Finds the names of all instructors whose department is in the Watson buildingb) Finds the names of all department is in the Watson buildingc) Finds the name of the dapartment whose instructor and building is Watson
• D. All of the mentioned Which of the following best describes the query?a) Finds the names of all instructors whose department is in the Watson buildingb) Finds the names of all department is in the Watson buildingc) Finds the name of the dapartment whose instructor and building is Watsond) Returns the building name of all the departmentsView Answer