Let `A = {1, 2}`and `B = {3, 4}`. Find the number of relations from A to B.

Explanation

To find the number of relations from set A to set B, we can follow these steps:

### Step 1: Identify the sets A and B
We have:
- Set A = {1, 2}
- Set B = {3, 4}

### Step 2: Determine the number of elements in each set
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