Which of the following statements is true regarding Vitamin $D$?

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

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.

Deficiency of which vitamin causes night blindness?

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

Following are various symptoms of $Marasmus$ $EXCEPT$,