Furlough means a leave of absence that is granted to a member of the services or a missionary. It is a soldier's holiday and hence Option A is the correct option.
Option B; Wild growth refers to the growing of something uncultivated. Hence this option is incorrect.
Option C; Wooden plough is a farming instrument with one or two blades fixed in a frame. This is an incorrect option.
Option D; Till means before. It is a less formal way of saying until. This is not the meaning of the given word and hence this option is incorrect.