Regarding testicular tumour, the following are false except

Seminomas are well known to be one of the most radiosensitive tumors About other options Option (a) : Commonest malignancy in older males is - Prostate cancer Option (c) : Stage I Nonseminomas (including teratomas) are t/t by surgery alone and show a high cure rate (>95%) Option (d) : Chemotherapy shows a good response in advance stage testicular tumors.