Ragi is the richest source of
A. Iron
B. Calcium
C. Iodine
D. Vitamin B complex

Hint: Ragi or Eleusine coracana is a cereal crop that is cultivated annually for obtaining ragi flour. It is found in regions of Asia and Africa. It is densely packed with a host of essential nutrients. Osteoporosis is treated using ragi.

Complete answer: The ragi is a grain species commonly known as finger millet due to five spikes present at the head of the grain. It is a rich source of various nutrients. It belongs to the Gramineae family of grasses. The curved or straight branches or ragi have brown or red florets. It is cultivated annually in India. The Ragi crop is drought-resistant and can tolerate slightly alkaline and acidic soils. Ragi comprises almost all macronutrients namely carbohydrates, proteins, fibre, and fats. It has very low levels of sodium and cholesterol. Appreciable amounts of micronutrients such as vitamins and minerals are also present in ragi. Vitamin C and E in ragi boost skin health. The key nutritional value of ragi is that it has high levels of calcium. It is the only non-dairy source that is rich in calcium as compared to other crops. It is used to treat calcium deficiencies. It is used in curing osteoporosis which is caused due to calcium deficiency. Ragi is used as a holistic breakfast food. It also supplies essential amino acids to the body. It is a gluten-free diet product. It balances the blood sugar levels also and is used in anaemia treatment.
So, the correct answer is option B.

Note: Ragi has a good amount of tryptophan which is an amino acid that regulates serotonin function in the brain. Thus, it regulates serotonin which is a stress-inducing neurotransmitter and is used to treat insomnia and stress. Hence, ragi also increases neural impulse conduction.