Anatomy of Flowering Plants Test 7

In open vascular bundle, cambium is present between xylem and phloem of the same vascular bundle, eg, dicot stems. Due to the presence of cambium, secondary growth in stem occurs and secondary permanent tissues (secondary xylem, secondary phloem and vascular rays) are formed.

Ground tissue includes all tissues except epidermis and vascular bundles. The ground tissue comprises the bulk of the primary plant body. Parenchyma, collenchyma and sclerenchyma cells are common in the ground tissue.
So, the correct answer is 'All tissues except epidermis and vascular bundles.'

In monocots cambium is absent as the whole procambium is consumed in the formation of vascular bundlesso there is no pholem parenchyma.

A conjoint and open vascular bundle will be observed in the transverse section of Dicot stem. Please edit your answer and post it again. TA conjoint and open vascular bundle will be observed in the transverse section of Dicot stem.

Monocot plants cannot be grafted as they lack the cambium tissue which is present in dicot plants. Cambium tissue is a meristematic tissue which is present in the vascular bundles of the dicot plants. This tissue has a regeneration capacity due to which it can form new tissue at the time of grafting. The lack of cambium in monocots makes it impossible to graft. Grafting or graftage is a technique used in horticulture that consists of taking tissues from one plant and putting them onto another plant. The two plants will then grow together.
The technique is a type of vegetative reproduction. Grafting is commonly used with roses, and fruit trees. It only works with dicots and gymnosperms and not with monocots. Monocots do not have a vascular cambium, which is needed for the process to work. 
Thus, the correct answer is option C.