How many letters of the English alphabet (capitals) appear same when looked at in a mirror ?

When considering mirror (vertical) symmetry of standard uppercase English letters, a letter appears unchanged by a vertical mirror if its left and right halves are mirror images. The commonly accepted set of capital letters with vertical symmetry is A, H, I, M, O, T, U, V, W, X, and Y — eleven letters in total. This classification is confirmed by standard symmetry references that list these exact letters as vertically symmetric, and note that others do not remain identical under a vertical reflection. Therefore, among the given options, 11 is the correct count.