Stem modified into green,flattened branches of unlimited growth for assimilatory function is

Prickles of rose are

In $Opuntia$,the stem is modified into a flattened green structure to perform the function of leaves (i.e.,photosynthesis). Cite some other examples of modifications of plant parts for the purpose of photosynthesis.

In $Duranta$,axillary buds and in $Carissa$ the apical bud is modified into stem thorns. What is correct for $Ulex$? It has

In which plant is the given structure found?

Select the correct option for the $Opuntia$ (prickly pear cactus) plant regarding the function of leaves and stems.