Option 1 -> "before we reach our place" would mean preparing tea prior to arrival, which is illogical in this context.
Option 2 -> "as soon as we reach our place" indicates the tea will be prepared immediately upon arrival, making perfect sense.
Option 3 -> "while we reach our place" is grammatically awkward and suggests preparing tea during the journey, which is impractical.
Option 4 -> "on we reach our place" is grammatically incorrect; "on" cannot be used this way with a clause.
Hence, Option 2: as soon as -> This conjunction perfectly expresses the intention to prepare tea immediately after reaching the destination, showing both timing and prompt action -> correct