In one of the greatest coincidences to arise on Brainly in quite some time, Choice-C is the correct choice for BOTH #15 and #16 .
Choice-C is the only situation in which the source is a different distance from each ear.
Answer:
(15)The sound will reach ear out of phase when you are standing directly to the right of sound source.
Because when we are behind or in front distance between both the ear to the sound source will be same.
Therefore, Option C is correct.
(16) The sound source will reach ear out of phase when you are standing directly to the right of sound source.
Therefore, option C is correct.
Both questions have same information.