A. 1200 – 1300 gm
B. 1600 – 2000 gm
C. 500 – 800 gm
D. 100 – 200 gm

The adult human brain weighs about 3 pounds (1,300-1,400 g). The adult human brain is about 2% of the total body weight. The average human brain is 140 mm wide. The average human brain is 167 mm long.

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