sir practice question 3 i did not get. please explain:

Q. 3) $\mathrm{if} \left(\mathrm{A}\cap \mathrm{B}\text{'}\right)\cup \mathrm{B}-\mathrm{A}\left(\mathrm{A}\cap \mathrm{C}\text{'}\right)\mathrm{uC}-\mathrm{A} \mathrm{and} \mathrm{A}\cap \mathrm{B}-\mathrm{A}\cap \mathrm{C}$, then which of the following relations is true?
A) A-B
B) B=C
C) C=A
D) None of these