Question

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:

• A. A-IV, B-III, C-II, D-I
• B. A-II, B-IV, C-I, D-III
• C. A-I, B-II, C-III, D-IV
• D. A-III, B-I, C-IV, D-II

Answer 1

The Correct Option is D

To solve the given problem, we need to match the items in List I with their corresponding descriptions in List II based on the characteristics of heart activity represented in an electrocardiogram (ECG).

	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

In an ECG:

• P-wave represents the depolarisation of atria, which corresponds to item III.
• Q-wave is part of the early ventricular depolarisation process marking the beginning of ventricular systole, but given the options, it is best associated with the beginning of systole (item I).
• QRS complex corresponds to the depolarisation of ventricles, which matches item IV.
• T-wave represents the repolarisation of ventricles, which matches item II.

From the analysis above, the correct matching is: A-III, B-I, C-IV, D-II.