A. Epidermal cells
A.
B. Guard cells
B.
C. Mesophyll cells
C.
D. Palisade cells
D.
Correct Answer: B
সঠিক উত্তর: B
Explanation
ব্যাখ্যা
Guard cells are specialized cells located on the epidermis of leaves that surround small pores called stomata. When these cells swell with water, they open the stomata, allowing for gas exchange.