Select the correct statement regarding the specific disorder of muscular or skeletal system.
Muscular dystrophy $-$ Age related shortening of muscles
Osteoporosis $-$ Decrease in bone mass and higher chances of fractures with advancing age
Myasthenia gravis $-$ Autoimmune disorder which inhibits sliding of myosin filaments
Gout $-$ Inflammation of joints due to extra deposition of calcium
