The question asks to select the word that best completes the sentence about hospital ward conditions.

Understanding the Vocabulary Options

Let's look at the meaning of each option to determine the correct fit for the sentence:

• Sanity: This term refers to the state of being mentally sound and rational. It is related to mental health, not the physical conditions or cleanliness of a place. Therefore, it does not fit the context of hospital wards' physical environment.
• Sanitarium: This word refers to a place, often a hospital, that is used for the treatment of long-term illnesses or for convalescence (recovery from illness). While related to health facilities, it names a type of institution, not a condition or state.
• Sanitery: This word is not a standard English word and appears to be a misspelling or an incorrect formation, likely intended to be related to 'sanitary'.
• Sanitary: This adjective relates to or is intended to promote health and cleanliness. It describes conditions that are hygienic and help prevent disease. This is crucial for maintaining a safe environment in hospital wards.

Choosing the Correct Word

The sentence focuses on the conditions within hospital wards that the staff must ensure. These conditions are directly related to health and cleanliness.

The phrase "proper ______ conditions" implies conditions that are clean, healthy, and free from disease-causing agents. The word 'sanitary' perfectly describes these conditions.

For example, hospital staff would implement sanitary procedures to ensure that surfaces are clean, preventing the spread of infections. This directly relates to maintaining good health and hygiene.

Therefore, the completed sentence should read: "The hospital staff ensured proper sanitary conditions in every ward."