Which type of engine normally employs this system? turbofan, turboshaft, turbojet or turboprop?

In a bypas engine, part of the air is fully compressed and is passed into the combustion chamber, whilst the remainder is compressed to a lesser extent and is ducted around the hot section. Which type of engine normaly employs this system:

A) turbofan
B) turboshaft
C) turbojet
D) turboprop

Other answer:

emily:
That's a description of a turbofan. Look at big planes at the airport. Big air intake with a big ring. Then a smaller engine. The outside of the ring is the low pressure bypass. The inside of the ring is the powering turbojet.

Turbo-shaft is a part of an engine not a type of engine. All turbos have a shaft in the middle.

Turbo-jet. No longer a common technology on its own. It's the engine part of every engine. Yeah I know that sounds redundant. With a turbo-fan it's the high pressure part. Early jet engines were entirely the high pressure part.

Turbo-prop – The type of engine that powered the P-3 Orions of my Navy squadron. They have propellers on the outside and a turbine engine in the middle. The ring around a turbo-fan makes a turbo-fan have closed propellers. Not having a ring around a turboprop makes the turbo-prop have opened propellers.

Slowest – turboprop but get go fast. Medium – Turbofan. Fastest – turbojet but how to get fast in the first place.

Gavin:
Just look them up on Wikipedia,org and all will be easily explained.
Skinner:
Just look them up on Wikipedia,org and all will be easily explained.
Robert:
Turbofan
Steve Bowlin:
A) turbofans : boeing passenger planes (737,747,767,787), airbus planes (a320, a330,a350,a380), modern fighter jets (f-16, f-22, f-15, f-35, rafale, eurofighter)

B) turbo shaft : helicopters

C) turbo jet : old planes (707, dc-8, f-4 phantom, f-86)

D) turbo prop : large propeller planes (dash-8, pc-12, 1900d)

Christopher:
Just look them up on Wikipedia,org and all will be easily explained.
Scott:
Just look them up on Wikipedia,org and all will be easily explained.
Parsons:
Just look them up on Wikipedia,org and all will be easily explained.
Audrey:
Just look them up on Wikipedia,org and all will be easily explained.
Joseph:
You just asked two questions. Are you just hoping that random strangers will do your homework for you without you bothering to even read the question? If you did read your other question, you will have the answer to this one.