Which of the following diseases disqualifies an applicant from being certified as a security officer?

Severe epilepsy is a condition that can significantly impair an individual's ability to perform the duties of a security officer. This condition is characterized by recurring seizures, which can be unpredictable and may occur without warning. Such episodes could hinder a person's situational awareness and physical capabilities, making it potentially dangerous for them to engage in the responsibilities associated with security work that often involves monitoring, responding to incidents, and ensuring the safety of others.

In contrast, hypertension (high blood pressure), asthma, and the common cold may be manageable with appropriate treatment and do not typically pose an immediate risk to the individual's job performance or the safety of others. For instance, many people with hypertension lead normal lives and can fulfill professional roles effectively with proper medical oversight. Asthma can also be controlled with medication and self-management strategies. The common cold is generally a mild ailment that does not impair an individual's ability to work. Therefore, it is severe epilepsy that stands out as a condition likely to disqualify an applicant from certification as a security officer due to its potential impact on performance and safety.