The correct option is A 7'O clock morning
We will consider each option.
(a) 7'O clock morning is represented as 07:00 A.M. in both 12- hour and 24- hour format.
(b) 7'O clock evening is represented as 07:00 P.M. in 12-hour format but in 24-hour format, it is shown as 12+7 = 19 hours
(c)4'O clock evening is represented as 04:00 P.M.in 12-hour format but in 24-hour format, it is shown as 12+4 = 16 hours
(d) 12'O clock midnight is represented as 12:00 A.M.in 12-hour format but in 24-hour format, it is shown as 12+12 = 24 but it is represented as 00:00 hours as after every 24 hours a new day starts