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53. What will be displayed by the following switch statement? char ch a switch (ch) case as case 'A' cout ch endl; break; case 'b' case 'B' cout ch endl break case 'C' case 'C' cout ch endli break, case 'd case D' cout ch endli A. abcd B. a D. ab 54. Does the following Switch statement cause a compile-time error? (n and alpha are of type int) switch (n) case 6 alpha 10; break case 2 case 5 alpha 20; break case 8 case 2 alpha- 30 A. Yes--one or more break statements are missing. B. Yes--there are duplicate case labels. C. Yes--the data types of the case labels are not valid. D. Yes--the default label is missing. E. No. 55. What is the output of the following C++code fragment? intl 120 Assume user types 30 cin in if intl 100) 66 (int2 50)) int3 int1 int2, else int3 intl int cout intl int int A. 20 30 150 B. 20 30 90 C. 2050 170 D. 2050 70 E. 20 30 70 56. Which of the following statements is syntactically correct? A. char c 'd'; B. char c 00 C. char c "d" D, char c "100