Which of the following is not a chemical reaction ?

✅ C. Monsoon

✅ D. Robert Millikan

✅ C. Protons

✅ C. Ole Roemer

✅ D. Focus

✅ C. Carbon Dioxide

✅ B. Vitamin D

Sunlight exposure enables vitamin D synthesis in skin. Read more

✅ C. Collapsing object of high density