Concept: Types of Magnets
- Permanent magnets (like bar magnets)
- Electromagnets (like current carrying solenoids)
Step 1: Bar magnet properties}
Bar magnet:
- Magnetism is permanent → (B)
- Polarity cannot be changed → (F)
So:
\[
A \rightarrow B, F \quad \Rightarrow ABF
\]
Step 2: Current carrying solenoid properties}
Solenoid:
- Polarity can be changed → (C)
- Magnetic strength can be varied → (E)
So:
\[
D \rightarrow E, C \quad \Rightarrow DEC
\]
Step 3: Match with options}
Correct pairing:
\[
ABF \text{ and } DEC
\]
Conclusion:
\[
\text{Option (C) is correct}
\]