Which of the following statements is false for the sets A, B and C, where: A = {x | x is letter of the word 'BOWL'} B = {x | x is a letter of the word 'ELBOW'} C = {x | x is a letter of the word 'BELLOW'}

• A ⊂ B
• B ⊃ C
• B = C
• B is a proper subset of C.