Which ONE of the following is not involved in the aetiology of systemic hypertension?

The answer is A. Arteriolosclerosis is the result of hypertension.

Renal hypertension is usually the result of chronic glomerulonephritis (B) or chronic pyelonephritis.

Conn's syndrome (primary hyperaldosteronism) is due to an adrenal tumour secreting aldosterone (C).

Phaeochromocytomas (D) secrete catecholamines.

Population studies have shown hypertension to correlate well with high average salt intake (E).