Select the option that expresses the given sentence in active form.
"The job work had been learnt by me."

Converting Passive to Active Voice:
· Passive: "The job work had been learnt by me."
· Active: "I had learnt the job work."
Explanation:
1. The subject "I" replaces "by me."
2. The verb "had been learnt" changes to "had learnt" in active voice.
3. The object "the job work" remains unchanged.
Thus, the correct answer is (d) "I had learnt the job work."