Concept:Going round the K’aba is a key rite performed during the Hajj pilgrimage.Explanation:During Hajj, Muslims perform Tawaf, which is circling the K’aba seven times.This is not specific to Eid-ul-Adha, Eid-ul-Fitr, or Ramadan.Therefore, the activity is done during Hajj.Answer:C. Hajj