Match List I (Magnet) with List II (Property) and select the correct answser using the codes given below the lists. List I A. Artificial magnet B. Permanent magnet C. Temporary magnet D. Earth as a magnet List II 1. Long lived 2. Last for infinitely long period 3. Short lived 4. Induced magnet Codes: ABCD

The correct answer is Option 1 (3 1 4 2). This matching aligns with the fundamental physical properties of different magnetic types:

• (A) Artificial magnet (3 - Short lived): These are man-made magnets, often created for specific tasks. Unless specifically designed for permanence, their magnetism can be easily lost through heating or physical impact, making them relatively short-lived compared to natural or specialized permanent magnets.
• (B) Permanent magnet (1 - Long lived): These materials (like Alnico) retain their magnetic properties for a significant duration without an external power source, hence they are described as long-lived.
• (C) Temporary magnet (4 - Induced magnet): These act as magnets only while under the influence of a strong magnetic field (induction). A classic example is a soft iron core in an electromagnet.
• (D) Earth as a magnet (2 - Last for infinitely long period): The Earth’s geomagnetic field, generated by the dynamo effect in its core, is a constant natural phenomenon persisting over geological timescales, effectively lasting "infinitely" in human terms.