How am I suppose to answer this car insurance question? (United Kingdom)

When filling out all the information for a vehicle insurance policy, when it asks “Do you have access to any other vehicles?” It only lets you pick one option from the drop down bar.

So say for example you’re taking out car insurance, but you also drive a van and a motorcycle. Are you suppose to select the one that you drive more often to give them a more realistic idea of what you drive day to day?

On the price comparison sites and some of the official insurance websites you cant even phone to get a quote over the phone, it can only be done online.

Thanks