Yes, from left to right.
A capital "B" has one horizontal line of symmetry.
yes it has one * * * * * No, the lower case letter has no line of symmetry.
The capital letter H does B, C, D, E, H, I, K, O, and X have a horizontal symmetry line.
q and b
their are many like B; D; C; X; A; O; I.....
The answer does depend on the font, but: B, F, G, J, L, P, Q, R and S. In a few fonts, for example, the top and the bottom of B are the same size so the letter does have an axis of symmetry.
SYMMETRY
In the good old days (when I was at school and was taught about rotational symmetry) it had one, but the modern definition is to say it has none.
The capital letters of the alphabet that exhibit horizontal line symmetry are B, C, D, E, H, I, K, O, X, and Z. These letters remain unchanged when flipped along a horizontal axis. This symmetry is characterized by their balanced shapes above and below the line of symmetry.
Yes capital A has one line of symmetry or 'mirror image'
B, C, D, E, H, I, K, O and X
A, H, I, M, O, T, U, V, W, X, and Y all have vertical symmetry. B, C, D, E, H, I, K, O, and X all have horizontal symmetry.