Bonus for step2
a 42vy old man develop increasing progressive muscular weakness involving both arms and leg for the past 2 years biopsy of quadriceps muscle reveal pattern of grouped atrophy of the myofibrils which of the following condition he have
1 werding hoffman dis
2 amytrophic lat sclerosisi
3 becker muscule dystrophy
4 myasthenia gravis
5 mitochondrial myopathy