Which of the following is true about Duchenne's muscular dystrophy?.
A. it presents in early childhood as difficulty walking/standing up.
B. it is caused by genetic absence of nicotinic receptors at neuromuscular junctions.
C. it involves only muscle of legs and pelvis.
D. it can only be inherited if one parent has Duchenne's dystrophy.
E. it can be diagnosed with anticholinesterase test.