Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The principle pathological abnormality in Klinefelter syndrome is dysgenesis of the seminiferous tubules.
Reasons (R) : This is evident from adulthood and progress with age. By adolescence, hyalinization and fibrosis are present within seminiferous tubules and Leydig cell function is impaired, resulting in hypogonadism.
In the light of the above statements, choose the most appropriate answer from the options given below :