Read the assertion and reason carefully and choose the best answer:
1. Assertion (A): Generally, lightning is seen earlier, and thunder is heard later.
Reason (R): Speed of the light is more than the speed of sound.
Reason (R): Speed of the light is more than the speed of sound.
2. Assertion (A): Every musical instrument vibrates to produce a different kind of sound.
Reason (R): The quality of sound is characterized by its pitch and loudness.
Reason (R): The quality of sound is characterized by its pitch and loudness.