AIIMS 2019 Botany Phaeophyceae MCQ Question

Option A accurately represents the structure of a water molecule (H₂O), which consists of two hydrogen atoms covalently bonded to one oxygen atom, forming a bent molecular geometry due to the presence of lone pairs on the oxygen atom. In contrast, options B, C, and D depict different molecular structures, such as carbon dioxide (CO₂) or methane (CH₄), which do not exhibit the same bonding arrangement or molecular shape as H₂O. Understanding these molecular geometries is crucial for grasping concepts related to polarity, hydrogen bonding, and the unique properties of water that are essential for biological systems.