The correct answer is option 1, which is 18.

To arrive at this answer, we need to analyze the criteria given: school teachers living in the cities who have two children, but are neither science graduates nor women.

Let`s break down each criterion and see how many individuals fit the description:

- School teachers living in the cities: We are looking for school teachers who reside in urban areas. The figure does not provide any specific data on the number of school teachers living in cities.

- Have two children: We need to identify individuals who have exactly two children. The figure does not provide any data on the number of children each individual has.

- But are neither science graduates nor women: We need to exclude individuals who are science graduates or women from the previous criteria. Again, the figure does not provide specific information on the number of science graduates or women who are school teachers and live in cities.

Since we do not have any concrete data or information to determine the exact number of school teachers living in cities who have two children, but are neither science graduates nor women, it is not possible to arrive at a precise answer. Therefore, the correct answer cannot be determined based on the given figure.

Alert - correct answer should be "Cannot be determined based on the