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Assertion (A): In a Rayleigh flow of subsonic compressible flow heating causes the Mach number to reach a maximum of 1; but the static temperature at this point is less than that due to frictional effects alone.                                     

Reason (R): This is due to extra storage of heat energy as internal energy.

Codes:

(A) Both A and R are individually true and R is the correct explanation of A

(B) Both A and R are individually true but R is not the correct explanation of A

(C) A is true but R is false

(D) A is false but R is true

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