Which of the following are true in the context to company law?

A. In case of transfer of shares, stamp duty is essential.

B. For transmission of shares no consideration is necessary.

C. A person cannot be director of more than 30 companies at the same time.

D. 'IPO' stands for Initial Public Obligation.

E. Departmental undertaking is a type of government undertaking.

Choose the correct answer from the options given below: