Which of the following relate to light as wave, particle, or both? (A) diffraction (B) photoelectric effect (C) E = mc2 (D) E = hn

Which of the following relate to light as wave, particle, or both? (

1.	Which of the following relate to light as wave, particle, or both? (A) diffraction (B) photoelectric effect (C) E = mc2 (D) E = hn
Answer» I THINK OPTION A IS CORRECT.