Explanation:

• The Buddha had two kinds of disciples – lay worshippers (upasakas) and monks (bhikkus or shramanas). The latter were organized into the Sangha or congregation. The membership of the Sangha was open to all, male or female above twenty years of age and who were free from leprosy, consumption and other infections diseases. However, slaves, soldiers and debtors were not allowed to enter the Sangha without the permission of their superior. As they lived on alms, they were known as bhikkhus.
? Sangha was an organization of monks who later on also became teachers of dhamma. The rules of Buddhist sangha were contained in Vinaya Pitaka.
Some of the features of sanghas were:

•  Initially, only men were allowed into the sangha, but later women also came to be admitted. Hence statement 1 is not correct.
•  All members of sangha were regarded as equal, having shed their earlier social identities on becoming bhikkhus and bhikkhunis. Hence statement 2 is correct.
• The internal functioning of the sangha was based on the traditions of ganas and sanghas, where consensus was arrived at through discussions. If that failed, decisions were taken by a vote on the subject. Hence statement 3 is not correct.