Which of These Statements Are True? (I)When Two Waves with the Same

Which of these statements are true? (i) When two waves with the same frequency and amplitude overlap,the result is a wave with the same frequency and twice the amplitude.
(ii.If the two waves with the same frequency and amplitude are 180 ^$\circ$ out of phase,the amplitude of the resulting wave is zero.
(iii) If two waves have the same frequency and amplitude but one is positive and the other is negative,the resulting wave is a standing wave with the same frequency and amplitude.
(iv.Interference maximum occurs when waves cancel each other out.

A) (i) and (iv) are true.
B) (ii) and (iii) are true.
C) (i) and (ii) are true.
D) All are true.
E) None are true.

Correct Answer:

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