Root cap is a specialized protective structure found on the tips of the terrestrial vascular plants. The cells of this root cap are:

• A
  Simple and usually form a homogenous parenchymatous tissue of short-lived cells
• B
  Simple and usually form a homogenous collenchymatous tissue
• C
  Complex and consist of outer collenchyma and inner sclerenchyma
• D
  Complex and consist of outer suberised cells and inner parenchyma