What is the expanded form of the abbreviation PMNL?

Poly Morpho-Nuclear Leucocytes

The correct answer is: (a) Poly Morpho-Nuclear Leucocytes

PMNL stands for Poly Morpho-Nuclear Leucocytes, which refers to a type of white blood cells (leukocytes) with multi-lobed nuclei. These cells are also known as neutrophils. They play a crucial role in the immune response and are involved in fighting against bacterial infections. Neutrophils are capable of engulfing and destroying invading pathogens, making them an essential component of the body's defense against infections.