Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: A sound wave has higher speed in solids than gases. 
Reason R: Gases have higher value of Bulk modulus than solids. 

In the light of the above statements, choose the correct answer from the options given below

Assertion (A)

 The speed of sound is higher in solids than in gases.

The speed of sound in a medium is given by:

• $$v = \sqrt{\frac{B}{\rho}}$$

Solids have a much higher bulk modulus $B$ compared to gases, which makes the sound travel faster in solids.

Reason (R):

 False – The reason states that gases have a higher bulk modulus than solids, which is incorrect.

• In reality, solids have a much higher bulk modulus than gases, which is why the speed of sound is greater in solids.
• Gases have the lowest bulk modulus, making the sound travel slowest in gases.

 A is true, but R is false.