Answer & Solution
Nanak (Option A) is the first Sikh Guru and the founder of Sikhism. He laid the foundation of the faith and his teachings are an integral part of the Guru Granth Sahib.
Har Rai (Option B) was the seventh Sikh Guru, known for his compassion and efforts in propagating Sikhism.
Bahadur (Option D) refers to Guru Tegh Bahadur, the ninth Sikh Guru, who sacrificed his life for the protection of religious freedom.
Angad (Option E) was the second Sikh Guru, succeeding Guru Nanak, and he contributed to the growth of the Sikh community.
Therefore, the correct option is Option C: Arjan, who compiled the Guru Granth Sahib, the central scripture of Sikhism.