Prasad, formerly the special Chief Secretary of the Environment, Forest, Science & Technology Department, has been promoted to the top government position.
The state Chief Secretary K S Jawahar Reddy directed officials concerned to take stringent measures to ensure that marriages of boys and girls do not take place before 18 years of age.
The development acquires significance in the wake of the TTD's announcement in April this year that Lord Hanuman's birthplace is located on Anjanadri, one of the seven Tirumala hills.
