Answer is : (b) Hydathodes
Hydathodes are involved in guttation. Hydathodes are specialised pore located along the leaf margins and tip which secrets water droplets. The exudation of water droplets from the tip or margin of the leaves is called guttation. Hydathodes mediated guttation occurs under high humidity and in the absence of transpiration.
Cuticle is an extracellular layer which covers the epidermis of plants which provides protection against dessication and external environmental stress.
Lenticels and stomata both regulates gaseous exchange between internal plant tissues and atmosphere and also regulates water movement through transpiration.
