The College of Defence Management is located in Secunderabad.
Option 1: Dehradun - Dehradun is a city in Uttarakhand, but it is not the location of the College of Defence Management.
Option 2: Wellington - Wellington is a city in New Zealand known for its natural beauty, but it is not the location of the College of Defence Management.
Option 3: Pune - Pune is a city in Maharashtra known for its educational institutions, but it is not the location of the College of Defence Management.
Option 4: Secunderabad - This is the correct answer. Secunderabad is a city in the Indian state of Telangana, and it is the location of the College of Defence Management.