With reference to the State Services, consider the following statements:
The officers of State Services are selected by the respective State Public Service Commissions.
The Chief Secretary heads the civil service administration in each state.
State Services are classified into Group A, Group B, Group C, and Group D, similar to Central Services.
The All India Services Act, 1951 mandates that at least 50% of senior posts in All India Services be filled by promotion from State Services.
Which of the statements given above are correct?
A1, 2, and 3 only
B1 and 2 only
C2 and 3 only
D1, 2, and 4 only
