Question about motor neuron and peripheral neuron?

[narutodemonkill]

which motor neuron 1.skeletal, 2.sensory,3.autonomic,4.both skeletal and autonomic must synapse on a peripheral neuron before reaching their effectors.

I thought the answer was 3. but not too sure and I can't locate the answer in my textbook or online.
any help would be appreciated.

[aptitude]

It's both autonomic and skeletal. They both have to synapse with a peripheral neuron.