Which of the following is not correct?

• A

  $\mathrm{LiOH}$ is a weaker base than $\mathrm{NaOH}$
• B

  Salts of Be undergo hydrolysis
• C

  $\mathrm{Ca}\left(\mathrm{HCO}_3\right)_2$ is soluble in water
• Correct answer
  D

  Hydrolysis of beryllium carbide gives acetylene

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