Which group of three of the following five statements (a-e) contain is all the three correct statements regarding beri-beri -
(a) A crippling disease prevalent among the native population of sub-Saharan Africa
(b) A deficiency disease caused by lack of thiamine (vitamin B1)
(c) A nutritional disorder in infants and young children when the diet is persistently deficient in essential protein
(d) Occurs in those countries where the staplediet is polished rice(e) The symptoms are pain from neuritis, paralysis, muscle wasting, progressive oedema, mental deterioration and finally heart failure