Answer: A 
Since it is not mentioned about the condition of hydrocele whether it is infected or encysted, the correct code is N43.3 which is used to code for unspecified hydrocele. A hydrocele is seen due to the accumulation of serous fluid in the scrotum. 
Option B is not correct because N43.1 is used to code for infected hydrocele but the infection is not specified here. 
Option C is not correct because N40.0 is used to code for Benign prostatic hyperplasia without lower urinary tract infection which is not the diagnosis here. 
Option D is not correct because N52.9 is used to code for erectile dysfunction  which is not the diagnosis here.