Which of the following is a protein-deficiency disease?

Among the five statements $(a - e)$ given below,identify the three correct statements regarding Beriberi:
$(a)$ This debilitating disease is found in the sub-Saharan population of Africa.
$(b)$ It is a deficiency disease caused by the lack of Thiamine (Vitamin-$B_1$).
$(c)$ It is a nutritional deficiency in older children and infants caused by a chronic lack of dietary protein.
$(d)$ This deficiency is commonly found in countries where polished rice is the staple food.
$(e)$ Symptoms include nerve weakness,pain,paralysis,muscle wasting,loss of appetite,mental confusion,and eventually heart failure.

Which diseases are caused due to deficiency of nutritive substances/nutrients? What are their symptoms?

Which of the following is a mode of nutrition?

Pellagra is caused due to the deficiency of

Which of the following pairs shows symptoms like swollen lips,thick pigmented skin on the hands,and irritability?