Answer:
e.a,b,c
Step-by-step explanation:
β-sheet are of two types
1. Anti parallel: Strands run in one opposite direction.
2. Parallel : Strands run in one direction
We know that β-sheet are the secondary structure in the proteins.These are connected by hydrogen bonds.
Important point for β-sheet
1.Sheet 1 is a representation of a parallel sheet
2.Sheet 2 is a representation of an anti parallel sheet
3.Sheet 1 will have four hydrogen bonds holding the two strands together
4. Sheet 2 will have three hydrogen bonds holding the two strands together.
So the option e is correct.