which of the following is not true about spongy bone? a. it is less dencse than compact bone.b. it is organized into structures that resemble a bridge's supporting girders.c. it is soft and spongy.d. it adds strength to bone without adding mass.

“It is soft and spongy” is not true for spongy bones. S option “C” is the correct option for the given question. Spongy bones are more prominently seen in those places of the body where the bone density is less. Spongy bones are also found at the end of long bones because of the fact that the end of long bones need to  be compressible as it has to deal with lot of stresses coming from various directions. These type of bones have red bone marrow in between them.