Which of the following conditions is the likely diagnosis for a man experiencing fatigue, weakness, and paralysis of skeletal muscles due to an autoimmune disorder affecting the neuromuscular junction? 

Myasthenia Gravis:

• Autoimmune neuromuscular disorder affecting nerve-muscle communication.
• Results in muscle weakness and fatigue, particularly in facial and limb muscles.
• Severity varies, managed with medications and therapies.

Atherosclerosis:

• Cardiovascular condition involving the narrowing and hardening of arteries due to fatty deposits.
• Can lead to heart attacks and strokes.
• Risk factors include lifestyle, genetics, and other factors.

Muscular Dystrophy:

• Genetic disorder causing progressive muscle weakening and degeneration.
• Various types exist, with different genetic mutations.
• Symptoms include muscle weakness and loss of muscle mass.

Osteoporosis:

• Bone disorder characterised by reduced bone density and increased fragility.
• Raises the risk of fractures, especially in the hip, spine, and wrist.
• Common among postmenopausal women (due to low estrogen levels) and the elderly.