For administrative convenience, Kerala is divided into:

The correct answer is A) Revenue Divisions.

Kerala is divided into 14 revenue divisions, which are further divided into 140 taluks. The revenue divisions are:

• Alappuzha
• Ernakulam
• Idukki
• Kannur
• Kasaragod
• Kollam
• Kottayam
• Kozhikode
• Malappuram
• Palakkad
• Pathanamthitta
• Thrissur
• Thiruvananthapuram

Revenue divisions are administrative units headed by a Revenue Divisional Officer (RDO). The RDO is responsible for the collection of taxes, maintenance of law and order, and other administrative matters in the revenue division.

The other options are incorrect because:

• Police districts are units of the Kerala Police headed by a Superintendent of Police (SP). The SP is responsible for the law and order situation in the police district.
• Assembly constituencies are electoral units for the Kerala Legislative Assembly. Each assembly constituency elects one member to the assembly.
• Judicial districts are units of the Kerala Judicial System headed by a District Judge. The District Judge is responsible for the administration of justice in the judicial district.