Final answer:
Platelet estimation on a differential blood cell film requires counting platelets in a minimum of 20 microscopic fields. This systematic counting is important for accurate blood clotting analysis and diagnosis. The correct option is a.
Step-by-step explanation:
The question concerns the process of estimating platelet count in a blood smear, which is a common procedure in hematological examinations.
A platelet estimate on differential blood cell film requires counting of platelets in a minimum of 20 microscopic fields to ensure statistical accuracy and to get a representative sample of the number of platelets present in the blood.
Platelets, also called thrombocytes, play a crucial role in blood clotting and are counted during a complete blood count to diagnose or monitor various medical conditions.
It is important to count platelets systematically and to use a grid or a table for organizing the count of each leukocyte type. The correct option is a.