Select the most appropriate option to fill in the blank.

Colonel Mishra lives in the flat just _______ mine.

The correct answer is 'Above'.

 Key Points

• The sentence requires a preposition that indicates position or location in relation to another object (in this case, "mine").
• The preposition "above" is used for describing the relative location of something in a vertical plane, as in buildings or levels of a structure.
• In such contexts, "above" is suitable to describe objects directly at a higher level or layer such as flats in a building.

Therefore, the correct answer is 'Option 3'.

Complete Sentence: Colonel Mishra lives in the flat just above mine.

 Additional Information

• The preposition "up" (Option 1) is incorrect in this context. "Up" is more appropriately used when describing directions or movement, rather than a fixed position. For instance, "He walked up the stairs".
• In the phrase "just upstairs mine" (Option 2), "upstairs" suggests a position or direction towards a higher level of a building, it is not typically used to describe a flat's specific location relative to another.
• The preposition "over" (Option 4) can be used to express "one level higher" but it is more commonly used when something is directly covering a lower layer, and this doesn't aptly describe apartments' relative positions to each other. For instance, "Put the blanket over the bed".