**Core Concept**
Left axis deviation is a type of electrocardiographic (ECG) abnormality characterized by an abnormal position of the QRS axis between -30° and -60°, typically indicating left ventricular hypertrophy, Wolff-Parkinson-White syndrome, or other conditions affecting the electrical conduction system of the heart.

**Why the Correct Answer is Right**
Left axis deviation occurs when the electrical impulse from the sinoatrial node is delayed or altered, causing the QRS complex to be directed more leftward than normal. This can be due to hypertrophy of the left ventricle, which can be caused by conditions such as hypertension, aortic stenosis, or cardiomyopathy. In Wolff-Parkinson-White syndrome, an accessory electrical pathway causes the QRS complex to be directed leftward, leading to left axis deviation.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because right axis deviation occurs when the QRS complex is directed more rightward than normal, typically between +90° and +180°.
* **Option C:** This option is incorrect because inferior axis deviation occurs when the QRS complex is directed more downward than normal, typically between -30° and 0°.
* **Option D:** This option is incorrect because left axis deviation is a specific range of axis deviation, and this option does not specify a correct range.

**Clinical Pearl / High-Yield Fact**
When interpreting ECGs, it's essential to consider the context and clinical history of the patient. Left axis deviation can be a sign of underlying cardiac disease, and further evaluation is necessary to determine the cause.

**Correct Answer: B. Left axis deviation is a type of electrocardiographic abnormality characterized by an abnormal position of the QRS axis between -30° and -60°.**