Lunchtime snack

Normal 4x4 sudoku rules apply. Place the digits 1 through 4 in each empty cell. Digits must not repeat within the same row, column, or box.

Parity lines: Adjacent digits along each parity line must alternate between odd (1,3) and even (2,4). Digits may repeat on the line.

Kropki dots: A black dot between cells indicates cell values with a 2:1 ratio. Not all dots are shown.