I think B is the correct answer. I am a Chinese native speaker. Actually, when we are doing daily conversation, we don't play close attention to the differences between those options. The main difference between “那”and "哪“：“那”=that or there;"哪“=where”。This is only my perspective, I advise you to hear from others, too.

Hi Ng B is correct. A and D are technically wrong, but in daily conversations, people wouldn't notice such tiny mistakes. C is incorrect. 那 means “that”， as in 那个、那天、那年、那次。 那儿=那里 means “the place （relatively far from the speaker, as opposed to 这儿）”， as in 朋友那儿、王老师那儿、or simply 那儿。 哪 and 哪儿/哪里 work in the same way. Try figure them out yourself. PS. Buy a decent dictionary, or find one that suits u on the internet, so that you will learn on the go.

what is difference between 那 and 哪 and 那儿

AB BANK doesnt need 那\那儿：bank's position is definite 朋友那儿≈ my friend's house or store or somewhere that you know 那vs那儿：the latter i think sounds better

B orD