Here are a few pictures of the room I want to redo. The long walls are painted off White and curtains are a shade of yellow. The wall behind the bed is a shade of brown.The furniture is teak. I would like to change all colours except the teak finish.please suggest options. Much appreciated.

I think you can start by de cluttering. There's too much going on. If you want to keep the bedspread, I would pull some colors from that. :) Teals, browns, whites. It would make a pretty room.

I feel the room will look even smaller if we went with option B because of the heavy furniture. Do you think the wardrobe wouldn't look pleasing with option A? Also, I can get the whole wall to decorate in option A.

Ok so go for ambient and cool colour wallpaper behind the wall. You can have same colour in ceiling that of wardrobe and make other wall plain light colour.