Which of the following statements are correct?

(A) The electric field and magnetic field vectors of an electromagnetic wave are perpendicular to each other and also perpendicular to the direction of propagation of wave.
(B) Short waves are reflected from ionosphere.
(C) Electric field vector, E and magnetic field vector B have the same frequency.
(D) The line integral of magnetic field induction over a closed path is not zero.

Choose the correct answer from the options given below :

(A), (B) and (C) only

The correct answer is Option (4) → (A), (B) and (C) only

(A) In an electromagnetic wave, the electric field $(\vec E)$, the magnetic field $(\vec B)$ and the direction of propagation is mutually perpendicular to each other.

(B) Short waves (or high frequency radio waves) are reflected from the ionosphere due to their interaction with ionized particles.

(C) In electromagnetic wave, $\vec E$ and $\vec B$ oscillate at the same frequency. This is because, they are part of the same wave.