Bulliform cells are specialized epidermal cells, frequently found in leaves of grass family members (A- 4).
Guard cells are kidney-shaped(in dicots) and dumb bell-shaped(in monocots), chloroplast containing cell, found in the stomata (B- 1).
Lenticels are aerating pores, adopted for the exchange of gases and found in secondary cortex frequently (C- 2).
Subsidiary cells are simple, thin walled cells, generally occurring associated with stomata (D- 3).