Previous Year Question
Match List-I with List-II and select the correct answer from the codes given below the lists:
List-I (Air pollutant) | List-II (Part affected) |
A. Asbestos dust | 1. Brain |
B. Lead | 2. Stomach |
C. Mercury | 3. Lung |
D. Carbon Monoxide | 4. Blood stream |
Codes:
A-1, B-2, C-3, D-4
A-3, B-1, C-2, D-4
A-3, B-2, C-4, D-1
A-2, B-3, C-1, D-4
Correct Answer: B
Detailed Solution
Asbestos dust → Lung (3): Microscopic asbestos fibres can enter the lungs through inhalation. Long-term exposure increases the risk of serious diseases such as Asbestosis, lung cancer and mesothelioma.
Lead → Brain (1): Lead is a cumulative toxic metal. It can particularly affect the development of the brain and nervous system in children and may cause permanent effects on learning and intellectual development.
Mercury → Stomach (2): Different forms of Mercury produce different toxic effects. It can affect several organs and systems, including the nervous, digestive and immune systems. Among the options available in this question, it is matched with the stomach.
Carbon Monoxide → Blood stream (4): After being inhaled into the lungs, Carbon Monoxide enters the bloodstream. It binds very strongly with haemoglobin to form carboxyhaemoglobin, thereby reducing the oxygen-carrying capacity of blood.