A、Uniform B、Special clothes. C、Hats. D、Shoes. D

Every public school has many rules and customs peculiar to itself -- uniform, special clothes, ties, hats, rituals and traditions. But the essential characteristics are more or less the same in them. A typical public school has about 500 boys. There may be some buildings which are three or four hundred years old. There are probably modern and well - equipped scientific laboratories.
   Though reaching is arranged centrally for the school as a whole, the boys live in separate "houses". Usually a boy enters a house, and remains in the same house for the whole of his time as a pupil. A typical house has about fifty boys, and they are all under the special care of the housemaster and his wife. The house itself is a world in miniature. "Fagging" is a well -known public school institution. Not long ago the youngest boy had to perform personal services for the oldest ones, doing such jobs as cleaning their shoes and running errands for them. Now it is much diminished.
What is not mentioned in the passage as is peculiar to a public school?