Functional incontinence is distinguished by:

• A. Results from external factors like physical limitations
• B. Caused by detrusor overactivity
• C. Only occurs in men
• D. Caused by urethral obstruction

Answer: (A)

Functional incontinence happens when the bladder itself is working normally, but leakage occurs because the person cannot get to the toilet in time due to external factors such as physical limitations, cognitive impairment, or environmental barriers. For example, severe arthritis, mobility difficulty, or being in an unfamiliar place without easy bathroom access can lead to leakage even though the bladder and urethral function are intact.

So the best choice points to external factors as the cause. The other options describe problems with the bladder itself or conditions that are not about accessibility, such as detrusor overactivity (urge incontinence), urethral obstruction (overflow incontinence), or a condition limited to men, which aren’t defining features of functional incontinence.