About simultaneous triggers in event sheet

I am having 2 triggers which are simply keyboard presses in event sheet, and are simply as follow:

Upon the layout creation, Object A is created.

When we have Object A, if the player presses 1, Object A is destroyed and Object B is created.

When we have Object A, if the player presses 2, Object A is destroyed and Object C is created.

When we have object B, if the player presses 3, Object B is destroyed and Object A is created.

When we have object C, if the player presses 4, Object C is destroyed and Object A is created.

From above, will there be any chance that both Object B and C can be created at the same time? Currently, I don't have the case of having both object B and C yet, but the tick rate is rather fast on desktop, you see.

You mean, if we have object A and the player press 1 and 2 at the same time ? No it's impossible

add to a number and if the variable is greater than 3 subtract 3 and call the letter by that