<prompt> A 40 year old male patient complains of pins and needles sensation in the legs. Patient consumes polished rice as staple food. This patient may be suffering from deficiency of-Vitamin CVitamin B1Vitamin B2Vitamin A  <response>: Deficiency of vitamin B1 causes beriberiBeri-beri is mostly seen in populations consuming exclusively polished rice as staple food. The early symptoms of thiamine deficiency are loss of appetite anorexia, weakness, constipation, nausea, mental depression, peripheral neuropathy, irritability etc. Numbness in the legs complaints of pins and needles sensations are reportedKey Concept:Deficiency of vitamin B1 causes beri-beriPin and needles sensations are characteristic features of beri beri 