If A = [5, 6, 7] and B = [7, 8, 9] then A U B is equal to

If A = [5, 6, 7] and B = [7, 8, 9] then A U B is equal to

A

[5, 6, 7, 8, 9]

B

[5, 6, 7]

C

[7, 8, 9]

D

None of these

Answer:

The correct option is A. [5, 6, 7, 8, 9]

Note