To check whether a char variable ch is an uppercase letter, you write ___________.

a. (ch >= 'A' && ch >= 'Z')
b. (ch >= 'A' && ch <= 'Z')
c. (ch >= 'A' || ch <= 'Z')
d. ('A' <= ch <= 'Z')

b A is wrong because ch >= 'Z'. C is wrong because of using ||. D is wrong because of incorrect syntax. The correct answer is B.