Identify the type of stamens as seen in the picture.

The correct option is D. Polyadelphous.

Option (D):

1. In the given picture, there are multiple stamens visible in the flower which are fused together into more than two filaments, showing the character of polyadelphous flower.
   
2. Examples: flowers of citrus, castor etc​

Option (A):

They are not monoadelphous as the stamens are not fused with the style.

Option (B):

1. The stamen is fused along with filaments and anther together in the case of synandrous flower.
   
2. But here these structures are not in a fused form. ​

Option (C):

They are not diadelphous as the stamens are arranged in more than two filaments.