Question

Assertion : The enlarged Q and R waves indicate myocardial infarction.

Reason :The QRS complex represents ventricular repolarisation.

(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

The correct option is (c) A is true but R is false.

Explanation:

The enlarged Q and R waves indicate a myocardial infarction (heart **).QRS complex begins as small downward deflection (Q) and continues as large upright (R) and triangular wave ending as downward wave ( *) at its base. It represents ventricular depolarisation (ventricuIar contraction).