Identify the correct statements for pollen grains(A) Pollen grain rep…

The correct answer is Option (2) → (A), (B) and (C) only

(A) Pollen grain represents male gametophyte. — Correct. The pollen grain is the male gametophyte of a flowering plant. It forms the male gametes.

(B) Pollen grain is a haploid unicellular body. — Correct. A pollen grain is formed from a microspore, which is made by meiosis of the microspore mother cell. So it starts as one cell with a haploid nucleus.

(C) The hard exine of the pollen is made up of sporopollenin. — Correct. The outer wall, the exine, is hard because of sporopollenin. It protects the pollen on its way to the stigma, and it is absent only at the germ pores, from where the pollen tube comes out.

(D) The intine of the pollen is composed of oxidative polymers of carotenoids or carotenoid esters. — Incorrect. The intine is the thin inner wall, made of cellulose and pectin. The carotenoid polymers belong to sporopollenin, the material of the outer wall.

NCERT Extract:
Stamen, Microsporangium and Pollen Grain – “… Pollen grains are generally spherical measuring about 25-50 micrometers in diameter. It has a prominent two-layered wall. The hard outer layer called the exine is made up of sporopollenin which is one of the most resistant organic material known. It can withstand high temperatures and strong acids and alkali. No enzyme that degrades sporopollenin is so far known. Pollen grain exine has prominent apertures called germ pores where sporopollenin is absent. Pollen grains are well-preserved as fossils because of the presence of sporopollenin. The exine exhibits a fascinating array of patterns and designs. … What is the function of germ pore? The inner wall of the pollen grain is called the intine. It is a thin and continuous layer made up of cellulose and pectin.”