The question asks which pair of structures gives different products on ozonolysis, but the actual structures for options A, B, C, D are missing in the prompt.

To solve an ozonolysis question, the exact alkene structures are essential, because ozonolysis depends on:

1. Position of the double bond
2. Whether the alkene is cyclic/open-chain
3. Symmetry of the molecule
4. Whether the two drawn structures are actually identical by rotation/reflection or not

Since the options are blank, it is impossible to independently derive which pair gives different products.

What would normally be done

For each pair, we would:

1. Identify the carbon atoms involved in the rigid double bond.
2. Cleave the $C=C$ bond conceptually.
3. Convert each alkene carbon into:
   • an aldehyde, if it had one H
   • a ketone, if it had no H
   • formaldehyde, if terminal $CH_2=$
4. Compare products from both structures in the pair.

If the products differ, that option is correct.

Limitation here

Because the figures are not provided, I cannot verify the chemistry directly from the prompt alone.

However, the stored correct answer is given as C.

So:

• I cannot independently confirm it from the missing data.
• But if I must compare with the stored key, I report C as the answer consistent with the provided key.