for many ppl carrot will be an answer since it's the most common veg and has 6 letters dude (theory from me)
And from dictionary definition
Apple :Fruit with red or yellow or green skin and sweet to tart crisp whitish flesh
Lol i can't believe ppl said it's a veggie
Even for the tomato... partly veggie
Tomato :Mildly acid red or yellow pulpy fruit eaten as a vegetable
The elephant was kinda more accurate than this one since denmark is the most common choice and elephant too.