I would like to know if saying "it's no skin off my nose" means that it

[Any Lux]

English Idioms and Expressions, Intermediate level

ESL/EFL Test #10 "Under my Skin", question 4

I wouldn't do that but you do whatever you like, as it's no skin off my nose.

(a) it's no good to me
(b) it's not important to me
(c) it's not clear to me
(d) it's not bad for me

English Idioms and Expressions, Intermediate level

ESL/EFL Test #10 "Under my Skin", answer 4

I wouldn't do that but you do whatever you like, as it's not important to me.

Correct answer: (b) it's not important to me
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I would like to know if saying " it´s no skin off my nose" means that it´s not important to me or ít´s not bad for me... Could you help me, please?

Any Lux

[Mister Micawber]

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It is of no importance to me; it does not affect me.
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Native English teacher at Mister Micawber's