Which of the following pairs is characterized by swollen lips,thick pigmented skin of hands and legs,and irritability?

Night blindness is:

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.

Marasmus disease is caused due to

Which one of the following vitamins can be synthesized in humans?

The disease anaemia is caused by the deficiency of which of the following vitamins?