The question asks:

Which compound gives an optically inactive product on hydrogenation?

However, the actual structures/options A, B, C, D are missing in the prompt. Only the labels are present, but no compounds are shown.

Because hydrogenation outcome depends entirely on the given alkene/alkyne structure, the question cannot be solved uniquely without those structures.

What would normally be checked

On hydrogenation, we examine whether the product formed:

1. creates a chiral center or not,
2. forms a meso compound (optically inactive), or
3. remains achiral.

A compound will produce an optically inactive product if, after addition of hydrogen, the resulting alkane is either:

• achiral, or
• meso.

But here

Since options A, B, C, and D are not visible, there is no way to determine which one satisfies this condition.

Therefore, the stored answer D cannot be verified from the information provided.

Conclusion

The question is incomplete because the molecular structures of options A, B, C, and D are missing.