Answer:
1. Of the mentioned options, bones majorly comprised of calcium. The combination of calcium and collagen forms bone strong and flexible so that they can withstand stress. More than 99 percent of the calcium in the body is found in the teeth and bones.
2. The correct answer is option C, that is, the person could have been suffering from muscular dystrophy. Muscular dystrophy refers to an array of inherited disorders, which weaken and destructs the muscles with time. This weakness and destruction are because of the absence of a protein known as dystrophin that plays an essential function for general functioning of the muscle.
3. The given statement is true, that is, the bones offer both protection and structure for the body.
4. The smooth muscles refer to the involuntary non-striated muscles, while the skeletal muscles are voluntary striated muscles and are more in number in comparison to the smooth muscles. Thus, the given statement is false.
