Explanation:

- Correct Answer: Option 3, Guru Angad

Guru Angad, the second Sikh Guru, developed the Gurmukhi script in the 16th century. It was created to record Sikh teachings and scriptures in a uniform manner.

- Option 1: Guru Ram Das

Guru Ram Das was the fourth Guru of Sikhism. He is known for founding the city of Amritsar and composing hymns.

- Option 2: Guru Arjan

Guru Arjan, the fifth Sikh Guru, compiled the Adi Granth, the precursor to the Guru Granth Sahib, and contributed to the expansion of Amritsar city.

- Option 4: Guru Amar Das

Guru Amar Das, the third Sikh Guru, is known for promoting social equality and establishing significant Sikh traditions.