The minimum distance of distinct vision, also known as the near point, is the closest distance at which the human eye can focus on an object clearly. For a normal human eye, this distance is typically 25 cm.
• (A) 50 cm: Incorrect. This is not the typical minimum distance for distinct vision.
• (B) 75 cm: Incorrect. This is too large compared to the normal near point distance.
• (C) 25 cm: Correct. The normal minimum distance for clear vision for a human eye is approximately 25 cm.
• (D) 22 cm: Incorrect. While this could be the case for some individuals, 25 cm is the average minimum distance for most people.
Thus, the correct answer is 25 cm, which is the typical near point of a normal human eye.
Final Answer: (C) 25 cm.