Which type of vehicle is shown in the picture and what is its maximum length permitted by law?

1. AA composite vehicle with a driver's compartment behind the engine; maximum permitted overall length - 17.60 metres.
2. BA composite vehicle with a driver's compartment in front of the engine; maximum permitted overall length - 16.50 metres.
3. CA connected vehicle with a driver's compartment behind the engine; maximum permitted overall length - 16.50 metres.
4. DA connected vehicle with a driver's compartment behind the engine; maximum permitted overall length - 17.60 metres.

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