Seal like limbs i.e. phocomelia is a specific side effect of –
**Core Concept**
Phocomelia refers to a rare congenital disorder characterized by the shortening or absence of limbs, resulting in flipper-like appendages. This condition is often associated with **teratogenic** effects, which are abnormalities in fetal development due to external factors. **Phocomelia** is a specific type of **limb malformation**.
**Why the Correct Answer is Right**
The correct answer is related to a drug that was famously linked to phocomelia in the past. **Thalidomide**, a sedative and hypnotic drug, was found to cause severe limb malformations, including phocomelia, when taken by pregnant women. This is due to its **teratogenic** effects on fetal development, particularly during the critical period of limb formation.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not specifically associated with phocomelia.
**Option B:** Incorrect as it is not the primary drug linked to this condition.
**Option C:** Incorrect because, although it may have side effects, phocomelia is not a characteristic one.
**Why Each Wrong Option is Incorrect (Continued)**
**Option D:** Incorrect, as the correct answer is the drug **Thalidomide**, which is notorious for causing phocomelia.
**Clinical Pearl / High-Yield Fact**
Phocomelia is a classic example of a **teratogenic** effect, highlighting the importance of careful medication management during pregnancy. **Thalidomide** is a well-known teratogen that can cause severe limb malformations.
**Correct Answer:** D. Thalidomide.