Final answer:
The group of elements correctly arranged in order of increasing electronegativity is OFPMgN; this arrangement reflects the general trends in the periodic table where electronegativity increases across a period.
Step-by-step explanation:
The question is asking which group of elements is correctly arranged in order of increasing electronegativity. Electronegativity is the measure of an atom's ability to attract and hold electrons and is a pivotal concept in understanding chemical bonding and molecule formation. Based on general trends in the periodic table, electronegativity increases from left to right and decreases down a group.
To accurately arrange a given group of elements in order of increasing electronegativity, one must be familiar with these trends, as well as with the relative electronegativities of different elements. Given the options (a) MgPNF, (b) NMgPF, (c) OFPMgN, and (d) Mg, we can determine that option (c) OFPMgN is correctly arranged in order of increasing electronegativity; oxygen (O) is more electronegative than phosphorus (P), which is more electronegative than magnesium (Mg), followed by nitrogen (N). This order reflects the general trend of electronegativity increasing across a period and fits with the positions of these elements on the periodic table.