The sounds of which frequency are human beings most sensitive?

✅ B. Sublimation of iodine

✅ B. Blood glucose level

✅ C. Japan being the Eastern most country in the world, it has the earliest sunrise

✅ C. 4

✅ C. vitamin C

✅ B. Jonas Salk

✅ D. Hydrogen bond

✅ C. Ole Roemer