The correct option is A Guru Nanak Dev Ji
"Langar" is the term used in Sikhism for the community kitchen in a Gurdwara. Most Gurdwaras have a Langar hall where vegetarian food is served to all the visitors without any distinction of religion, caste, gender, economic status, or ethnicity. The institution of Langar was started by the founder of Sikhism, Guru Nanak Dev Ji.