Four light waves are represented by
`i. y=a_1sin omegat`
ii. `y=a_2sin(omegat+epsilon)`
iii. `y=a_1sin 2omegat`
iv.` y=a_2sin2(omegat+epsilon)` Inteference fringes may be observed due to superposition of
A. (i) and (ii), (iii) and (iv)
B. (i) and (iii), (iii) and (iv)
C. (ii) and (iv), (iii) and (iv)
D. (iii) and (iv) only