Consider the following statements 
(A) In taking into account the fact that any object which floats must have an average density less than that of water during world war I, a number of cargo vessels are 
made of concrete. 
(B) Concrete cargo vessels were filled with air. 
Select the correct option.
(a) (A) is false but (B) is true.
(b) Both (A) and (B) are true.
(c ) (A) is true but (B) is false.
(d) Both (A) and (B) are false.

• A

  Both (A) and (B) are true.

• B

  (A) is true but (B) is false.

• C

  (A) is false but (B) is true.

• D

  Both (A) and (B) are false.