In this study NN0113-6856 will be given to humans for the first time. We will be looking into how safe different single doses of the new investigational product NNC0113-6856 is and we will measure its amount as well as the amount of specific parts of the new investigational product in blood. The study will look at the effects of different single doses of NNC0113-6856. This could either be as an oral dose (cohort 1 to 5) or one injection into the vein (intravenous \[IV\]-cohort). Participant will get the investigational product either as one or two tablets (oral dose in cohort 1 to 5) or as injection into the vein (IV cohort). The study will last for about 6-10 weeks (up to 14 weeks in case of rescheduling for stand-by participants).