Monica, Amar, Akbar and Anthony live in four apartments that are arranged side by side. Only one of the four persons is the landlord whose apartment is at one end. Amar's apartment is neither next to Monica's apartment nor next to Akbar's apartment. Monica's apartment is not at one end. Amar is not the landlord. Who is the landlord?

Let us establish the positions $1,2,3,4$.
From our previous logical arrangement, the valid sequence that fits all conditions is:

* Position 1: Amar
* Position 2: Anthony
* Position 3: Monica
* Position 4: Akbar

Let us check the conditions against this arrangement:

1. "Amar's apartment is neither next to Monica's nor next to Akbar's": Amar is at 1, adjacent only to Anthony at 2. This condition is satisfied.
2. "Monica's apartment is not at one end": Monica is at 3, which is an inner position. This condition is satisfied.
3. "Amar is not the landlord": The landlord must live at one of the ends (1 or 4). Since Amar is at 1 and is not the landlord, the landlord must live at the other end (Position 4).
4. Position 4 is occupied by Akbar.

Therefore, Akbar is the landlord.