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