Rhino and Drop pod dont appear
 

Just bought Army Builder and I have loaded the 40K 5th addition file. I cant find in the list Rhinos or Drop Pods. What am I missing? Thanks.

OK, this is a little on the slightly vague side of things. The quick answer is that transport options are not selectable outside of the squads which can take them. This is so it can properly be validated - you wouldn't want to take ten rhinos and drop pods only to be reminded of the fact that you only have two squads that can take the option?

You will also note that in the codex, units which may take transports may have an additional stipulation, such as not having jump packs or having a certain amount of models. Which is another reason why you need to be a little more specific...