Histology

Step 1: Understanding the Concept:
Ciliated simple columnar epithelium consists of a single layer of tall, column-shaped cells that have cilia on their apical surface. Cilia are motile structures that beat in a coordinated manner to move substances over the epithelial surface. We need to identify the locations where this specific tissue type is found.

Step 2: Detailed Explanation:
- A. Lining of some bronchioles of the respiratory tract: This is a correct location. The cilia here are part of the mucociliary escalator, which moves mucus and trapped debris up and out of the respiratory tract.
- B. Cover surface of ovary: This is incorrect. The surface of the ovary is covered by simple cuboidal epithelium, often referred to as germinal epithelium.
- C. Larger ducts of many glands: This is incorrect. While some large ducts may have columnar epithelium, it is typically non-ciliated or stratified, not ciliated simple columnar.
- D. Ventricles of brain: This is a correct location. The ventricles of the brain and the central canal of the spinal cord are lined by ependymal cells, which are a type of glial cell that forms a ciliated simple cuboidal to columnar epithelium. The cilia help to circulate the cerebrospinal fluid (CSF).

Step 3: Final Answer:
Based on the analysis, ciliated simple columnar epithelium is found in some bronchioles (A) and the ventricles of the brain (D). Therefore, the correct option is (A).