The smallest size of a cell which can be seen with unaided eye is or differentiation capacity of human eye is(a) 1 micron(b) 10 micron(c) 100 micron(d) 1000 micron

The correct answer is (c) 100 micron
The human eye has a limited capacity to distinguish objects based on size, and this is called its differentiation capacity or resolving power.
• The smallest size of a cell that can be seen with the unaided eye typically ranges around 100 microns.
• 1 micron (1 µm) is too small to be seen with the naked eye, and 10 microns (10 µm) is also generally below the resolution threshold for human vision.
• 100 microns (100 µm) is the size range at which cells or larger structures like red blood cells (which are about 7-8 microns in diameter) become visible without a microscope.
• 1000 microns (1 millimeter) is much larger than the size of most individual cells, and structures this large are clearly visible to the unaided human eye.
Typical Size Range for Cells:
• Bacterial cells are typically about 1 to 10 microns in size and are usually invisible without a microscope.
• Human cells like epithelial cells are generally in the range of 10 to 30 microns.
• Larger cells such as egg cells (like a chicken egg) can be visible to the naked eye, as they are much larger than typical cells, with diameters in the range of 100 microns or more.
The smallest size of a cell that can be seen with the unaided human eye is typically around 100 microns. Therefore, the correct answer is: (c) 100 micron.