Pollen grain along with the growing tube has how many haploid nuclei?

In spirogyra during the gemination of zygospore how many haploid nuclei take part

IF one pollen grain produces two male gametes how many pollen grains are needed to fertillize 10 Ovules?

Number of male gametes in the growing pollen tube is :

[A] : Nucleus of pollen grain divides meiotically and form a pollen tube and a generative nucleus . [R] : Nucleus of pollen grain divides meiotically to form pollen tube and generative nucleus.

[A] : Nucleus of pollen grain divides meiotically and form a pollen tube and a generative nucleus . [R] : Nucleus of pollen grain divides meiotically to form pollen tube and generative nucleus.

[A]: Spore mother cells within the anther pollen sacs form four haploid pollen grains. [R]: Spore mother cells divide meiotically to form four haploid pollen grains.

[A]: Spore mother cells within the anther pollen sacs form four haploid pollen grains. [R]: Spore mother cells divide meiotically to form four haploid pollen grains.

[A]: Spore mother cells within the anther pollen sacs form four haploid pollen grains. [R]: Spore mother cells divide meiotically to form four haploid pollen grains.