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NEET · Biology · STD 11 - 15. Body fluids and criculations

 Match List \(I\) with List \(II\).
List \(I\) List \(II\)
\(A\). \(P\)-wave \(I\). Beginning of systole
\(B\). \(Q\)-wave \(II\). Repolarisation of ventricles
\(C\). \(QRS\) complex \(III\). Depolarisation of atria
\(D\). \(T\)-wave \(IV\). Depolarisation of ventricles
Choose the correct answer from the options given below :

  1. A A-I, B-II, C-III, D-IV
  2. B A-III, B-I, C-IV, D-II
  3. C A-IV, B-III, C-II, D-I
  4. D A-II, B-IV, C-I, D-III
Verified Solution

Answer & Solution

Correct Answer

(B) A-III, B-I, C-IV, D-II

Step-by-step Solution

Detailed explanation

The correct answer is option (2) as in a standard ECG, P-wave represents the electrical excitation (or depolarisation) of the atria which leads to the contraction of both the atria. - QRS complex represents the depolarisation of ventricles which initiates the ventricular contraction.
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