Which of the following is not correct in relation to ETFs?

Which of the following is not correct in relation to ETFs?
A . ETFs provide exposure to an Index or a basket of securities that trade on the exchange like a single stock
B . ETFs can be bought and sold on the exchange at prices that are usually closer to the actual intra Cday NAV of the scheme
C . ETFs trade very close to their actual NAVs
D . Intra Day trading of ETFs is very expensive

Answer: D