Please answer the following question by reasoning step-by-step.
A hinged door is not always found in which room of the house?\nOptions:\n- jamb\n- own house\n- building\n- kitchen\n- washing machine

kitchen
With minimum area for planning results in giving a very small space for kitchen.

Kitchen area is open to the family room and hence there is not a hinged door found.

.

Thus, the answer is kitchen