For whom vs. for that

[jian]

Test No. incompl/elem-39 "Relative Pronoun Exercises", question 5

Well, I should say someone for ......... money is no object.

(a) whom
(b) who
(c) that

Test No. incompl/elem-39 "Relative Pronoun Exercises", answer 5

Well, I should say someone for whom money is no object.

Correct answer: (a) whom
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Why is "for whom"?

jian

[Mister Micawber]

As object of the preposition, for, only whom will serve here. (Which is the object pronoun for that.)
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber