Which of the following is correct : -

Options

A. Cyclo heptane is an aromatic compound
B. Diastase is an enzyme
C. Acetophenone is an ether
D. All the above

Answer

To solve the question "Which of the following is correct?" we need to evaluate each of the given options one by one.

### Step-by-Step Solution:

1. **Evaluate Option A: Cycloheptane is an aromatic compound.**
- Cycloheptane is a cyclic compound with seven carbon atoms (C7H14).
- For a compound to be aromatic, it must be cyclic, planar, fully conjugated (having alternating double bonds), and follow Huckel's rule (4n + 2 π electrons).
- Cycloheptane does not have any double bonds; all carbon atoms are sp3 hybridized and it is not planar.
- **Conclusion:** This statement is **incorrect**.

2. **Evaluate Option B: Diastase is an enzyme.**
- Diastase refers to a group of enzymes that catalyze the breakdown of starch into simpler sugars like maltose.
- It is indeed classified as an enzyme.
- **Conclusion:** This statement is **correct**.

3. **Evaluate Option C: Acetophenone is an ether.**
- Acetophenone has the structure C6H5COCH3, which includes a carbonyl (C=O) group.
- Ethers have the general structure R-O-R', where R and R' are alkyl or aryl groups.
- Since acetophenone contains a carbonyl group, it does not fit the definition of an ether.
- **Conclusion:** This statement is **incorrect**.

4. **Evaluate Option D: All the above.**
- Since options A and C are incorrect, this option cannot be correct.
- **Conclusion:** This statement is **incorrect**.

### Final Conclusion:
The only correct statement is **Option B: Diastase is an enzyme**.