Which of the following amino acid is a ‘α-helix terminator’

Q. Which of the following amino acid is a ‘α-helix terminator’
A. tryptophan
B. phenyl alnine
C. tyrosine
D. proline
Answer: proline

A. tryptophan
B. phenyl alnine
C. tyrosine
D. proline
Answer: proline