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A. Iron

B. Sodium

C. Aluminum

D. Calcium

A. Magnesium

B. Calcium

C. Sodium

D. Potassium

A. Iodine

B. Florine

C. Chlorine

D. Bromine

A. Type 0

B. Type A

C. Type B

D. Type AB

A. Four groups

B. Three groups

C. Two groups

D. Five groups

A. 15 days

B. One month

C. Two months

D. Three months

A. Carbohydrates

B. Vitamins

C. Proteins

D. Fats

A. 2 K Calories

B. 4.1 K Calories

C. 6.3 K Calories

D. 8.0 K Calories

A. 160 dB

B. 60 dB

C. 100 dB

D. 20 dB

A. Provide striking surface to the wings for flying

B. Provide insulation for preserving body heat

C. Impart coloration for species as well as sex recognition

D. Make the body surface waterproof