Select Helper with html option

hi iam trying to put some html option in the select helper like this

<%= select('personnel', 'department', %w{Accounting Executive Export I.T. HR Marketing Logistics Production Purchasing R&D Sales}, html_options = {size = 30}) %>

I think it is not the right way. How do I do it? And what are the options we can use in the options and html_options parameter.

Thanks