$A$ person who is a habitual drinker (alcoholic) is always deficient in which vitamin?

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 of the following is mismatched?

The vitamins required to maintain bone density:

Which disease is caused by a prolonged deficiency of nicotinic acid (Niacin/Vitamin $B_3$)?

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