This question pairs a true statement about a health condition with a false statement about its cause.

Statement I is correct: Sick Building Syndrome (SBS) is a genuinely recognised condition in which the occupants of a particular building experience a cluster of acute symptoms — headaches, irritation of the eyes, nose and throat, dizziness, difficulty concentrating and fatigue — that clearly worsen with time spent inside that building and tend to ease after leaving it. The defining feature is that the symptoms track the building rather than any single diagnosable illness.

Statement II is incorrect: the cause of SBS is poor indoor air quality, not a polluted water supply. Contributing factors include inadequate ventilation, chemical contaminants from indoor sources such as volatile organic compounds released by paints, adhesives, carpets and furnishings, chemical contaminants from outdoor sources, and biological contaminants like mould, bacteria and pollen. Illness caused by contaminated water is a distinct, water-borne problem and is not what produces SBS.

Since the first statement is accurate but the second wrongly attributes SBS to polluted water, the fitting verdict is Statement I is correct but Statement II is incorrect. The option calling both correct endorses the false water-cause claim; the option calling both incorrect wrongly rejects the real existence of SBS; and the option calling only the second correct is the reverse of the truth.

Correct answer: Statement I is correct but Statement II is incorrect.