Which of the following is a major component of thiamine,biotin,coenzyme $A$,and ferredoxin?

Which mineral element is present in the structure of hemoglobin,myoglobin,and cytochrome compounds?

Which of the following pairs of elements is responsible for the structure and permeability of the cell membrane,respectively?

Identify the odd one out among the following elements based on their mobility in plants.

Match the following:

Column-$I$	Column-$II$
$(1)$ Nitrogen	$(p)$ Formation of mitotic spindle
$(2)$ Phosphorus	$(q)$ Protein,vitamins
$(3)$ Potassium	$(r)$ Phosphorylation reactions
$(4)$ Calcium	$(s)$ Maintain the turgidity of cells

The deficiencies of micronutrients not only affect the growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below,which group of three elements shall affect most,both photosynthetic and mitochondrial electron transport?