What is the ploidy level of the cells in an angiosperm plant body?

Identify the ploidy of the following cells: Generative cell,Male gamete,Microspore mother cell,Microspore,Tube cell.

Angiospermic plants are characterised by:
$I.$ Double fertilisation
$II.$ Triploid endosperm
$III.$ Diploid endosperm
Choose the correct option from the following regarding the above statements.

In angiosperms,microsporogenesis and megasporogenesis

Name the plants which exhibit unusual flowering phenomena.

Which of the following is called 'Terror of Bengal'?