Consider the following relations:

$\text{ 1. }A-B=\mathrm{A}-(\mathrm{A}\cap B)$

$\text{ 2. }A=(A\cap B)\cup (A-B)$

$\text{ 3. }A-(B\cup C)=(A-B)\cup (A-C)$

Which of these is/are correct?

• A

  1 and 3

• B

  2 only

• C

  1 and 2

• D

  2 and 3