What is the difference between a primary group and a secondary group?

primary group: It is a small social group whose members share close, personal, enduring relationships. And Secondary groups are large groups whose relationships are impersonal and goal-oriented.

where's the

abu bakr, was a senior companion and—through his daughter aisha—a father-in-law of the islamic prophet muhammad. abu bakr became the first openly declared muslim outside muhammad's family. abu bakr served as a trusted advisor to muhammad.