Please explain experts.....

Dear Student,
Here X is Bone. Bone has bone marrow that is the site of production of cells of Y that is blood. Here, the correct answer regarding X and Y is option (C). 
Option (A) is incorrect because Matrix of Y is fluid. 
Option (B) is incorrect because Matrix of X ( Bone) is non pliable. 
Option (D) is incorrect because X contains solid ground substance. 
Regards