Earned leave can be combined with which of the following?

According to the Central Civil Services (Leave) Rules, 1972, specifically Rule 10, any kind of leave recognized under the rules (such as Earned Leave, Half Pay Leave, Commuted Leave, Maternity Leave, and Study Leave) can be granted in combination with or in continuation of any other kind of leave. However, Casual Leave (CL) is not a "recognized leave" under these rules; it is treated as being on duty and is governed by separate executive instructions. A fundamental principle of these rules is that Casual Leave cannot be combined with any other regular leave (like Earned Leave). Since options A, B, and D all include Casual Leave, they are incorrect. Option C correctly lists types of leave (Half pay leave, maternity leave, and sick/medical leave) that can be legally combined.