why is hol vannak a piros pizsamak rejected?
Why indeed. It should be accepted.
Itt még miért nem "hol vannak a piros pizsamak"?
What is the rule for the placement of "van" and "vannak" in a sentence? Sometimes it is placed last and sometimes it is near the beginning of a sentence or phrase.
When there is a question word (such as “Hol” in this case), the main verb needs to follow immediately.