41. What is used in a presentation or animation to improve the quality of reception?a) Pictures b) slidec)page. d) Database42is a feature by which you can hide or reveal areas of a layer.a) Masking b) encapsulate. c) polymerization d) none of them43. Multiple images can be selected using keya) CTRL b) SHIFT c) A & B Bothd) CAPS44. Another type of computer animation is known asa) Thermodynamics b) Kinematics c) Trinematics.d) Dynamics45. Which of the following is correct entry in the timeslider?a)3f 9f. b) 3s 9f. c) 3f 9s d)3s 9s46. A DBMS that is based on relational model is called as.a) ADBMS b) CDBMS c) RDBMS D)EDBMS47are real world objects about which information is to be stored indatabase.a) Entitiesb) Objects c) Data d) Attributes48. Aa) Nullvalue means unknown or missing value.b) junk c) litter d) refuse49. Select......... to open Add Tables dialog box in relationship window.a) Insert -> Add Tablesb) Add-> Tablesc) Add Tables -> Insertd) Edit-> Add Table50. Which type of relationship is created between class and class teacher or librarycard issued to a student?a) One to Oneb) One to Manyc) Many to oned) Many to Many​