AIIMS 2019 Biology Types of Algae MCQ Question

Option A is correct because it accurately represents the molecular structure of water (H₂O), showcasing the bent geometry due to the two hydrogen atoms bonded to a central oxygen atom, which has two lone pairs of electrons. In contrast, options B, C, and D depict molecular structures that do not correspond to H₂O, such as carbon dioxide (CO₂) or other compounds, which have different bonding arrangements and geometries. Understanding the molecular geometry is crucial, as it influences the physical properties and reactivity of the substance.