The correct option is B On full moon day of Kartika
Guru Nanak Dev was born on 13 April 1469on the full moon day of Kartika in Talwandi, a village in the Sheikhupura district, to the west of Lahore. He was the founder of Sikhism and the first Guru of the Sikhs. He believed in the values of equality, fraternity, goodness, and virtue. The basis of Sikhism lies in the teachings of Guru Nanak and his successors.