The heart is covered by two layers of membranes. The membranes are called

$(i)\Rightarrow a., (ii) \Rightarrow b., (iii) \Rightarrow c., (iv) \Rightarrow d.\\$

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$(i)\Rightarrow d., (ii) \Rightarrow c., (iii) \Rightarrow b., (iv) \Rightarrow a.\\$

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$(i)\Rightarrow c., (ii) \Rightarrow d., (iii). \Rightarrow a., (iv) \Rightarrow b.\\$

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$(i)\Rightarrow b., (ii) \Rightarrow d., (iii). \Rightarrow a., (iv) \Rightarrow c.\\$

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Solution

The correct option is B
$(i)\Rightarrow d., (ii) \Rightarrow c., (iii) \Rightarrow b., (iv) \Rightarrow a.\\$

The pericardium is a double-walled sac containing the heart and the roots of the great vessels. The pericardial sac has two layers, a serous layer and a fibrous layer. It encloses the pericardial cavity which contains pericardial fluid.

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