The presence of lead in drinking water can adversely affect human health. Which three systems of the human body are most sensitive to lead? Choose the correct answer from the options given below.

1.Nervous system

2.Cardiovascular system

3.Renal system

4.Respiratory system

5.Hematopoietic system

A1, 3, 5 only ✓ Correct

B2, 3, 4 only

C2, 4, 5 only

D1, 3, 4 only

Correct answer: (A) 1, 3, 5 only

Explanation

Lead most strongly harms the nervous, renal and blood-forming systems.

Statement 1, the nervous system, is highly sensitive as lead impairs brain and nerve function.

Statement 3, the renal system, is affected as lead damages the kidney tubules.

Statement 5, the hematopoietic system, is hit as lead blocks the making of haemoglobin.

The cardiovascular and respiratory systems are less directly targeted than these three.

Children are especially vulnerable as lead lowers their intelligence and development.

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