From looking at the deck plans I'd say that each of these cabins will be looking out on the lifeboats. Cabin 4139 may have a view between the lifeboats. If you're just looking for sunlight, either should be fine.
I don't think the French doors open. I think they are just floor to ceiling picture windows with a decorative railing outside.
"A truly happy person is one who can enjoy the scenery on a detour."