Question

which is the most common type of dehisence pattern in anther?

Answer 1

There is no answer possible for giving the name of most common pattern of anther dehiscence.
There are various patterns of dehiscence shown by different plants such as
Poricidal: Pollens released through pores, e.g., Brinjal,

Longitudinal: Pollens released through the longitudinal slit of anther lobes, e.g., China rose, Cotton, etc