Step 1: Identifying the form.
The word "Maghonah" is derived from the noun "Maghon".
The ending "-ah" indicates it belongs to the genitive singular case.
Step 2: Vibhakti classification.
Genitive case corresponds to Shashthi Vibhakti.
It denotes possession or relation, meaning "of Maghon".
Step 3: Number identification.
Since the word is singular, it falls under Ekavachanam.
Step 4: Eliminating wrong options.
- Dvitiya Bahuvachanam: Would denote plural object form, not suitable.
- Shashthi Ekavachanam: Correct, matches the form "Maghonah".
- Panchami Ekavachanam: Would denote ablative case, not correct.
- Chaturthi Ekavachanam: Would denote dative case, not correct.
Step 5: Conclusion.
Thus, the form "Maghonah" is in Shashthi Ekavachanam.