Which of the following are correct statements regarding beri-beri?
(a) A crippling disease prevalent among the native population of sub-Saharan Africa.
(b) A nutritional disorder in infants and young children when the diet is persistently deficient in essential proteins.
(c) A nutritional disorder in children when the diet is persistently deficient in essential proteins.
(d) Occurs in those countries where the staple diet is polished rice.
(e) The symptoms are pain from neuritis,paralysis,muscle wasting ,progressive oedema,mental deterioration and finally heart failure.