What is the difference between "who" and "whom"?

[Monika Selesh]

ESL/EFL Test "Relative Pronoun Exercises", question 4

......... do you think would have a car like that?

(a) Whom
(b) That
(c) Who

ESL/EFL Test "Relative Pronoun Exercises", answer 4

Who do you think would have a car like that?

Correct answer: (c) Who

Your answer was: incorrect
Whom do you think would have a car like that?
_________________________

Why we used who and not whom here

[Alan]

Who is the subject of the sentence.
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English as a Second Language
You can read my ESL story Present Simple

[Mfiliov]

What's the difference between Who and Whom?

[Torsten]

Who is or asks for the subject of a sentence while whom is or asks for an object:

Who gave you the money?
Whom gave you the money to?

In the first sentence somebody gave you some money.
In the second sentence you gave the money to somebody.

TOEIC short conversations: Two coffee shop customers discuss how to plug in laptop computer.

[Xiao_Lai]

I'd suggest both answers are correct, however, "who" is used more in general verbal practice.
Notify me with explanation if I am wrong, thanks in advance!

[Torsten]

Yes, I agree with you Xiao Lai but in the given sentence only 'who' is correct.

TOEIC listening, photographs: Cutting wood with an ax

[Xiao_Lai]

Dear Torsten,
Thanks for your quick response! Although you didn't give the explanation, you made me believe someone is always there. It's quite early in your residence, isn't it.
Anyway, I'll do more work in digging it out.
Thanks again!