Which of the following are the main components of an IED ?

An Improvised Explosive Device (IED) is a non-conventional explosive weapon. Its functional architecture typically consists of four primary components, often remembered by the acronym PIES:

• P (Power Source): Usually a battery or capacitor that provides the electrical energy needed to trigger the device.
• I (Initiator/Detonator): A small quantity of sensitive explosive or a heating element that starts the detonation process.
• E (Explosive): The main charge or filler intended to cause damage.
• S (Switch): The trigger mechanism (such as a pressure plate, timer, or remote control) that completes the circuit.

Option D is the most comprehensive as it includes the detonator, which is essential to bridge the gap between the low-energy trigger and the high-energy main explosive charge. Option C is incomplete as it lacks the initiator.