IUCD having the longest life span is-
**Core Concept**
The question tests knowledge of **intrauterine contraceptive devices (IUCDs)**, specifically their varying durations of action. IUCDs are a type of **long-acting reversible contraceptive (LARC)**.
**Why the Correct Answer is Right**
The correct IUCD has a lifespan due to its specific design and the **hormone release mechanism** or the **copper content** which provides the contraceptive effect. The longest-lasting IUCD is designed to provide contraception for up to 10 years or more, depending on the type.
**Why Each Wrong Option is Incorrect**
**Option A:** May have a shorter lifespan compared to the correct answer.
**Option B:** and **Option C:** Also have shorter lifespans, with specific durations based on their design and material.
**Clinical Pearl / High-Yield Fact**
The longest-lasting IUCD is memorable for its **10-year duration**, making it a convenient option for long-term contraception.
**Correct Answer:** D. Copper T 380A (10 years)