Change the voice: She has discussed the matter with her teacher.

The matter has discussed with her teacher by her.

The matter has been discussed with her teacher by her.

The matter is being discussed with her teacher by her.

None of these

The matter has been discussed with her teacher by her.

Rules of Voice Change (Present Perfect Tense):

Active: Subject (She) + has/have + past participle (discussed) + object (the matter).

Passive: Object (The matter) + has/have been + past participle (discussed) + by + subject (her).