Parts of the following sentence are given as options. Identify the part that contains a grammatical error. If there is no error, select 'No error'.
Ashwatthama, Drona’s / only son, has had developed / a fondness for lavish living.

A

No error

B

a fondness for lavish living.

C

only son, has had developed

D

Ashwatthama, Drona’s