He found that men who had ejaculated more than five times a week in their 20s were a third less likely to develop aggressive prostate cancer later in life .
Those who ejaculated more than five times a week were a third less likely to develop serious prostate cancer in later life .
(See options at the end). If the first sentence is true, is the second one also true?
Options are:
i. no
ii. yes
ii.