A. 'A'<=ch<='Z’ B. (ch>=“A”)&&(ch<="Z") C. (ch>='A’)&&(ch<='Z’) D. ('A'<=ch) || ('z'>=ch)
A. ‘0’<=ch<='9' B. (ch>='0' )&(ch<='9') C. (ch>='0' )&&(ch<='9') D. (ch>='0' ) AND (ch<='9')