If it cannot be moved
The south carries weight rather than clarity, and the tradition does not place study here. Where the room is fixed, the desk is turned so the reader faces north or east — the direction faced matters more than the room.
What the দক্ষিণ governs
South is Yama’s direction, and it carries weight rather than light. The tradition builds it up — heavy walls, storage, mass — and keeps openings modest.
Where the অধ্যযন কক্ষ belongs
A study is placed for concentration and for morning light, which puts it in the same corner family as the pooja room. Seating direction matters as much as the room here: the tradition seats the reader facing east or north.