1.What is the proper C++ if statement to test if a character variable called in_classification contains neither the letter j nor the letter s?

(a) if (!(in_classification == 'j' || in_classification == 's'))

(b) if (in_classification = "j" or in_classification = "s")

(c) if (in_classification == "j" or in_classification == "s")

(d) if (in_classification = 'j' or in_gender = 's')

(e) if (in_classification != 'j' && in_classification != 's')

(f) if (in_classification == 'j' || in_classification == 's')

(g) None of (a) through (f) is a correct answer.