The graph of the line through (2, 3) that is perpendicular to the line with equation x = -1 also goes through

which point?

a. (0, -1)
b. (-2, 3)
c. (2, -4)
d. (1, 4)

x = -1 is parallel to the y axis,
hence the line perpendicular to it is parallel to the x axis
and therefore has equation y = constant.
Since it passes through (2, 3) the constant is 3,
so any other point it passes through has coordinates (??, 3)

There's your answer.