1. riboflavin
2. cytochorme-a3
3. folic acid
4. All of these
cytochorme-a3
1. cobalt
2. sodium
3. chlorine
4. magnesium
cobalt
1. vitamin-B12
2. vitamin-B6
3. vitamin-B2
4. All of these
vitamin-B12
1. calcium
2. phosphorus
3. vitamin-D
4. All of these
All of these
1. insulin
2. thyroid
3. thymus glands
4. enterocrinin
insulin
1. iron
2. calcium
3. magnesium
4. sulphur
iron
1. haemoglobin
2. myoglobin
3. cytochromes
4. All of these
All of these
1. xerophthalmia
2. night blindness
3. keratomalacia
4. All of these
All of these
1. Biosphere reserves
2. Cryopreseravation
3. Wildlife sanctuaries
4. National parks.
Cryopreseravation
1. cheilosis
2. glossitis
3. headache
4. All of these
All of these