The erection or enlargement of a garage for more than five motor vehicles, or motor-vehicle station, or gas filling station, or parking space for the parking, storage or sale of automobiles, or the conversion of any premises not so used, to be used for such purposes, if otherwise allowed, shall not be permitted if any part of the lot or plot in question is situated within a distance of 200 feet measured along the same street from the hereinafter enumerated buildings, or if any part of the lot or plot in question is situated within a distance of 200 feet in a direct line from the nearest point of any of the following buildings:
B. A duly organized school, other than a public school, conducted for children under 16 years of age and giving regular instruction at least five days a week for at least eight months a year.
C. A hospital maintained as a charitable institution.
E. A theater containing at least 300 seats.