he correct answer is Option 2, i.e.Cork.

• In-Plant tissues, the cell walls of ‘cork’ are coagulated by ‘suberin‘ which makes them impervious to water & gas molecules.
• Protective tissues:
  • These tissues provide fortification to the plant.
  • They include two basic things which are known as the ‘epidermis & cork’.
• The following table shows the components of protective tissues with respective features. 
  

  Components of Protective tissues	Features
  Epidermis	It is a layer of cell that makes up the outer casing in the plant. At certain places, the stomata perforate the epidermis. The stomata help in loss of gaseous exchange & water
  Cork	It is the external protective tissue that substitutes the epidermal cells in mature roots & stems. Cork cells lack intercellular gaps & lifeless. The cell walls of corks are coagulated by suberin which makes them impervious to water molecules & gas molecules.