What is a difference between parallel and antiparallel $-$sheet secondary structures?

Question $3$ options:

Parallel $-$sheets have amino acid side chains alternating up and down, whereas antiparallel side chains alternate down and up$.$

Parallel $-$sheets require a larger loop connecting together the individual peptide strands in the sheet.

Parallel $-$sheets have three times more stabilizing H bonds between backbone amides than antiparallel $-$sheets.

Parallel $-$sheets are longer than antiparallel sheets.