The correct answer to the question is option 1 - vitamin A. Night blindness is a vision disorder that affects the ability to see in low light or at night. It can be caused by a deficiency of vitamin A in the diet. Vitamin A plays a crucial role in maintaining healthy vision, particularly in the retina of the eye.

Vitamin B complex, option 2, refers to a group of different vitamins including B1, B2, B3, B5, B6, B7, B9, and B12. While these vitamins are essential for overall health and function of the body, they do not directly address night blindness.

Option 3, vitamin C, is an important antioxidant that helps support the immune system and maintain healthy skin, but it does not specifically target night blindness.

Option 4, vitamin D, is primarily responsible for promoting healthy bones and teeth, as well as supporting the immune system. While it is important for overall health, it is not directly related to correcting night blindness.

Therefore, the correct option to correct night blindness is vitamin A, as it is essential for maintaining healthy vision, particularly in low light or at night.