Step 1: Understanding the Question.
The question asks which one of four school health infrastructure statements is wrong.
Step 2: Key Concept.
School health guidelines lay down specific standards for classroom space, furniture, lighting, and toilet facilities to keep children healthy and comfortable while studying.
Step 3: Detailed Explanation.
A per capita floor space of at least 10 sq ft per student is a recognized standard, so this statement is correct.
Recommended school desks are of the flat type, not sloping or angled designs. A flat desk surface, matched to the child's height, supports good posture and prevents spinal problems. Calling for desks to be of a plus type does not match this accepted design guideline, so this statement is the incorrect one.
Sufficient natural light entering preferably from the left side of a right handed child is a standard classroom lighting recommendation, so this statement is correct.
A ratio of one urinal for 60 students and one latrine for 100 students is also part of accepted school sanitation norms, so this statement is correct as well.
Step 4: Final Answer.
The statement that desks should be of plus type is not correct, school desks are recommended to be flat type.