Johan Gustav Christoffer Thorsager Kjeldahl (] 16 August 1849 18 July 1900), was a Danish chemist who developed a method for determining the amount of nitrogen in certain organic compounds using a laboratory technique which was named the Kjeldahl method after him.

Based on that paragraph can we conclude that this sentence is true?
Kjeldahl died when he was 50 years old

OPTIONS: (i). Yes. (ii). It's impossible to say. (iii). No.
(i).