Which of the following is a correct preventive screening matched with the appropriate age?

The correct preventive screening associated with the appropriate age is the colonoscopy at 45 years old. Current guidelines recommend that individuals at average risk for colorectal cancer begin regular screenings at age 45. This is crucial as colorectal cancer is one of the most common cancers, and early detection through a colonoscopy can significantly reduce morbidity and mortality associated with the disease.

Mammograms typically begin at age 40 for routine screening, making the option of 30 years old inappropriate. Pap smears are generally recommended to start at age 21, regardless of sexual activity, which makes 25 years old misleading based on current guidelines. Blood pressure screenings should start in adolescence and should be done regularly thereafter, rather than waiting until 40 years old. This highlights the importance of understanding recommended screening ages to ensure proper preventive healthcare practices.