Pir:

• A Pir is a spiritual guide or leader in Sufism. The term is often used to refer to a Sufi master who has attained a high level of spiritual realization and guides disciples on their spiritual journey.

Shaikh:

• Shaikh is a title used in Sufi traditions to refer to a spiritual leader, teacher, or elder. It is often used to address a Sufi master or a knowledgeable person in the Sufi order.

Murshid:

• Murshid is another term used to denote a spiritual guide or mentor in Sufism. It signifies someone who provides guidance, teachings, and support to individuals on their path of spiritual development.

Murid:

• Murid refers to a disciple or follower in Sufi traditions. A Murid is someone who seeks spiritual guidance and learning from a Sufi master, often forming a close teacher-disciple relationship.

So, the correct option is [4].