Author: Abid Otho

A. light waves only
B. sound waves only
C. Both Light waves and sound ways
D. None of these

Submitted by: Abid Otho

A. Echo
B. reverberation
C. resonance
D. None of these

Submitted by: Abid Otho

A. Mecury
B. Venus
C. Mars
D. Jupiter

Submitted by: Abid Otho