Which of the following option is correct according to its geometry?

CONCEPT:

Molecular Geometry

• Molecular geometry refers to the three-dimensional arrangement of the atoms that constitute a molecule.
• The geometry of a molecule can be determined using the VSEPR (Valence Shell Electron Pair Repulsion) theory, which states that electron pairs around a central atom will arrange themselves to minimize repulsion.

EXPLANATION:

• 1) CHBr₃: The central atom is carbon, which forms four bonds with one hydrogen and three bromine atoms. The molecular geometry is tetrahedral, not trigonal planar.
  
• 2) CO₂: The central atom is carbon, which forms two double bonds with two oxygen atoms. The molecular geometry is linear, not V shape.
  
• 3) BF₃: The central atom is boron, which forms three single bonds with three fluorine atoms. The molecular geometry is trigonal planar. This is the correct option.
  
• 4) H₂S: The central atom is sulfur, which forms two single bonds with two hydrogen atoms and has two lone pairs of electrons. The molecular geometry is bent or V-shaped, not linear.
  

Therefore, the correct option according to its geometry is: 3) BF₃ - Trigonal planar.