Step 1: Understanding the Concept:
Nutritional deficiency diseases occur when the body lacks sufficient amounts of essential vitamins, minerals, or macronutrients.
Detailed Explanation:
Let us match each deficiency disease in List-I with its cause in List-II:
- (A) Anemia: A condition characterized by a reduced count of red blood cells or hemoglobin, commonly caused by a deficiency of Iron (III) (which is a key component of hemoglobin).
- (B) Pellagra: A disease characterized by diarrhea, dermatitis, and dementia, caused by a deficiency of Niacin (Vitamin $B_3$) (I) or its precursor amino acid, tryptophan.
- (C) Kwashiorkor: A severe form of malnutrition characterized by edema and an enlarged liver, caused by a severe deficiency of dietary Protein (IV), even if calorie intake is sufficient.
- (D) Goiter: An enlargement of the thyroid gland caused by a deficiency of Iodine (II), which is required to synthesize thyroid hormones.
This yields the match: (A) - (III), (B) - (I), (C) - (IV), (D) - (II).
Step 2: Final Answer:
The correct matching sequence corresponds to option (3).