If P = {4, 5, 6, 7, 8, 9}, Q = {4, 5, 6}, R = {7, 8, 9} then which of the following statements are correct ?
B⊆A
B and C are equivalent sets
All the elements of Q are elements of P
⇒Q⊆P
Also, both Q and R have same no. of elements
⇒ They are equivalent sets.