Deficiency of Vitamin $A$ results in ...... .

The fundamental requirement of food is for

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

Which of the following is $NOT$ a symptom of $Marasmus$?

Which group of three of the following five statements $(1-5)$ contains all three correct statements regarding beri-beri?
$1.$ $A$ crippling disease prevalent among the native population of sub-Saharan Africa.
$2.$ $A$ deficiency disease caused by lack of thiamine (vitamin $B_1$).
$3.$ $A$ nutritional disorder in infants and young children when the diet is persistently deficient in essential protein.
$4.$ Occurs in those countries where the staple diet is polished rice.
$5.$ The symptoms are pain from neuritis,paralysis,muscle wasting,progressive oedema,mental deterioration,and finally heart failure.

Pellagra is caused due to the deficiency of