Which of the following sets are equal. 1. {p,q,m,n} 2.{m,p,n,q} 3.{q,p,p,m,m,p,n} 4.{p,q,n,,n,m}

• A. 1 and 2 are equal
• B. 2 and 3 are equal
• C. 3 and 4 are equal
• D. All are equal.