Four light sources produce the following...

Four light sources produce the following four waves
(i) `y_(1) = a sin (omegat + phi_(1))`
(ii) `y_(2)= asin2 omegat`
(iii) `y_(3) = a^(‘) sin (omegat + phi_(2))`
(iv) `y_(1) = a sin (omegat + phi_(1))`
Superposition of which two waves give rise to interference?

(i) and (ii)

(ii) and (iii)

(i) and (iii)

(iii) and (iv)

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Four light sources produce the following four waves(i) `y_(1) = a sin (omegat + phi_(1))`(ii) `y_(2)= asin2 omegat`(iii) `y_(3) = a^(‘) sin (omegat + phi_(2))`(iv) `y_(1) = a sin (omegat + phi_(1))`Superposition of which two waves give rise to interference?