A. I had been found by his lordship to be unfit for the service.
B. I was soon found by his lordship to be unfit for the service.
C. I was found by his lordship to be unfit for the service.
D. I was soon found out by his lordship to be unfit for the service.
Given sentence is in simple past tense and it is in active voice.
Rule :
Subject + (was/were) + V3 + Other agents