The brownish-black pigmented area in the midline stretching from xiphisternum to symphysis pubis during pregnancy is called:

Correct option is B

Ans. (b) Linea nigra
Sol. Linea nigra is a dark vertical line that appears on the abdomen during pregnancy due to hormonal changes, particularly increased melanin production. It runs from the xiphoid process (chest) to the pubic symphysis and usually fades after delivery.
Explanation of each option:
· (a) Chloasma gravidarum – Incorrect. Also called "melasma" or "pregnancy mask," it refers to dark patches on the face, not the abdomen.
· (b) Linea nigra – Correct answer. A pigmented line along the midline of the abdomen during pregnancy.
· (c) Striae gravidarum – Incorrect. These are stretch marks that develop due to skin stretching, not pigmentation.
· (d) Striae albicans – Incorrect. These are white, mature stretch marks formed when collagen is damaged, usually appearing postpartum.