What condition is caused by a deficiency in Vitamin A?

A deficiency in Vitamin A can lead to night blindness, which is specifically characterized by the inability to see well in low light or darkness. Vitamin A is crucial for maintaining healthy vision because it is a vital component of rhodopsin, a pigment found in the retina that enables the eyes to adapt to changes in light. When there is insufficient Vitamin A, the production of rhodopsin is impaired, leading to difficulties in seeing in dim light conditions.

The other conditions listed are related to different nutrient deficiencies. Scurvy is caused by a lack of Vitamin C, rickets is due to insufficient Vitamin D, calcium, or phosphate, and osteoporosis is associated with deficiencies in calcium and Vitamin D as well. Each of these conditions can be linked to different vitamins and minerals, highlighting the importance of a balanced diet rich in essential nutrients for overall health.