Correct option is D
Sol. Oedema refers to the abnormal accumulation of fluid in the body's tissues, causing swelling. It can be caused by various factors such as heart failure, kidney disease, or inflammation. The accumulation leads to swelling of the affected tissues, and while it can be reversible, the underlying condition causing it must be treated.
Explanation of each option:
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(a) It is fluid retention in the body – Correct answer. Oedema is fluid retention in the tissues, resulting in swelling. It occurs due to an imbalance in the fluid regulation in the body.
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(b) Affected tissues become swollen – Correct answer. Swelling is a typical sign of oedema, which is caused by the fluid accumulation in the interstitial spaces of tissues.
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(c) It is reversible – Correct answer. Oedema can be reversible if the underlying cause is treated, such as with medications or lifestyle changes.
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(d) All of these – Correct answer. All the given points are true about oedema, making this the most accurate option.