Question

If A = {x: x is a prime number}

B = {x: x is an odd natural number}

Then A ∩ B is

• A. {1, 3, 5, 7, 11, 13, 17, .....}
• B. {2, 3, 5, 7, 9, 11, .....}
• C. {3, 5, 7, 11, 13, 17, .....}
• D. None of these

Answer 1

The correct option is C

{3, 5, 7, 11, 13, 17, .....}

A ∩ B is defined as set in which the elements common in both A & B are present.

A = {2, 3, 5, 7, 11, 13, 17, .....}

B = {1, 3, 5, 7, 9, 11, 13, 15, 17, .....}

A ∩ B = {3, 5, 7, 11, 13, 17, ......}