When the string is stretched between two rigid supports, under certain tension and vibrated

• A

  antinodes at both ends and at least one node in between
• Correct answer
  B

  Nodes at both ends and at least one antinode in between
• C

  Nodes at both ends and no antinode in between
• D

  antinodes at both ends and no node in between

Hence, the correct answer is option: 'B'.