Inclusion Criteria:  Male aged 20-55 years (both inclusive) at the time of signing the informed consent. Both parents of Japanese descent. Body mass index between 20.0 kg/m^2 and 24.9 kg/m^2 (both inclusive). Considered to be generally healthy based on the medical history, physical examination, and the results of vital signs, electrocardiogram and clinical laboratory tests performed during the screening visit, as judged by the investigator.  Exclusion Criteria:  Any disorder which in the investigator's opinion might jeopardise subject's safety or compliance with the protocol. Glycated haemoglobin (HbA1c) greater than or equal to 6.5% (48 mmol/mol) at screening. Use of prescription medicinal products or non-prescription drugs, except routine vitamins, occasional use of acetaminophen, ibuprofen and acetylsalicylic acid, or topical medication not reaching systemic circulation within 14 days prior to the day of screening. Presence or history of any clinically relevant respiratory, metabolic, renal, hepatic, cardiovascular, gastrointestinal, or endocrinological conditions.