2. How many of the following is/are incorrect?
i. The importance of the equation E=mc² is that energy has mass.
ii. Electromagnetic radiation can be thought of as a stream of particles called photons.
iii. Electromagnetic radiation exhibits wave properties.
iv. Energy can only occur in discrete units called quanta.

(A) 0

(B) 1

(C) 2

(D) 3

(E) 4

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