Echoes are produced due to? A) Reflection of sound B) Refraction of sound C) Diffraction of sound D) Polarization of sound Related MCQs: Talks between Gandhi and Ouaid-e-Azam in 1944 failed due to? The number of types of gametes produced by a heterozygous individual is? “Bile Juice” is produced in which part of body? In locomotives the draught is produced by