The correct answer to the question is option 3: Both 1 and 2.

Statement 1 is correct. World Vitiligo Day is observed on 25th June every year. This day is dedicated to raising awareness about vitiligo, a long-term skin condition that causes patches of skin to lose their color.

Statement 2 is also correct. Vitiligo is indeed a progressive skin disease. It occurs when the cells that produce melanin, the pigment that gives color to the skin, die or stop functioning. As a result, white patches appear on the skin, and these patches often spread and enlarge over time.

Therefore, both statements 1 and 2 are correct. World Vitiligo Day is observed on 25th June every year to raise awareness about vitiligo, a progressive skin disease characterized by the loss of skin color in patches.