Which one of the following is the correct matching of a vitamin,its nature,and its deficiency disease?

Nutritional disorder,keratomalacia is caused by the deficiency of vitamin

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

Vitamin $- C$ or ascorbic acid prevents ...........

What are the trace components of our food?

Which group of three of the following five statements $(I-V)$ is correct regarding beriberi?
$I.$ $A$ crippling disease prevalent among the native population of sub-Sahara Africa.
$II.$ $A$ deficiency disease caused by lack of thiamine (vitamin-$B_{1}$).
$III.$ $A$ nutritional disorder in infants and young children when the diet is persistently deficient in essential protein.
$IV.$ Occurs in those countries where the staple diet is polished rice.
$V.$ The symptoms are pain from neuritis,paralysis,muscle wasting,progressive oedema,mental deterioration and finally heart failure.