I would like some clarification with regards to comparing nouns. In some references like Minna no Nihongo, the sentence formula would be something like
A と B と + どちら のほうが/が + Adjectiveですか。
Which one is bigger, the sun or the moon?
But when I was watching a Japanese From Zero YouTube clip, か was used instead of と and the last と was omitted.
Japanese From Zero example: 太陽か月どちらが大きですか。
I am still a beginner, and for now what I've learned was that か is used as a particle to indicate question, and と was used to join nouns. I was just wondering why か is acceptable in this example. Thank you in advance!