<prompt> Target fibres are characteristicaly seen in a muscle biopsy of-DermatomyositisMotor neuron diseaseMyaesthenia gravisDrug induced myopathy  <response>: Ans. is b i.e., Motor neuron disease Target fibers During denervation atrophy there is cytoskeletal reorganization of some muscle cells, which results in a rounded zone of disorganized filaments in the center of the fiber target fiber. o Amongst the given options only motor neuron disease can result in denervation of the muscle 