The last element to be entered on a ladder rung is a(n) :

A) coil.
B) contact.
C) XIC instruction.
D) XIO instruction.

Ladder Rung

A component of a ladder diagram in programmable logic controllers, representing a condition leading to an output action.

XIC Instruction

In programmable logic controllers (PLCs), an "Examine if Closed" instruction that checks if a specific input condition is true or a contact is closed.

XIO Instruction

An instruction in PLC programming that stands for "Examine if Open," used to check if a condition is false.