The correct option is D which lack sporopollenin
The outer wall of pollen grain is known as exine. It is made up of sporopollenin. It is a highly resistant substance and can withstand high temperature and strong acids and alkalis.
Germ pores are prominent apertures present on the exine. Sporopollenin is not present at the germ pores.
Sperms are released into the female gametophyte through a pollen tube.
Germ pore is not made of cellulose and pectin, it's the inner wall of pollen called intine that is made of cellulose and pectin.