For which of the following pairs of compounds are the correct notations given?

Options

A.
B.
C.
D.

Answer

To solve the question regarding the correct notations for the given pairs of compounds, we will analyze each pair step by step.

### Step 1: Analyze Pair A
- **Notation Given**: NT and Syn
- **Explanation**:
- Syn (or cis) indicates that substituents are on the same side.
- NT (or trans) indicates that substituents are on opposite sides.
- **Observation**: If both substituents (phenyl groups) are on the same side, then the correct notation should be Syn, not NT.
- **Conclusion**: This pair is incorrect.

### Step 2: Analyze Pair B
- **Notation Given**: Syn
- **Explanation**:
- In this case, we have H and OH groups.
- If both H and OH are on the same side, this is indeed a Syn addition.
- **Observation**: The representation shows H and OH on the same side.
- **Conclusion**: This pair is correct.

### Step 3: Analyze Pair C
- **Notation Given**: Anti
- **Explanation**:
- Anti indicates that substituents are on opposite sides.
- **Observation**: If H and OH are on opposite sides, this is indeed an Anti addition.
- **Conclusion**: This pair is correct.

### Step 4: Analyze Pair D
- **Notation Given**: Cis and Trans
- **Explanation**:
- Cis indicates that substituents are on the same side.
- Trans indicates that substituents are on opposite sides.
- **Observation**: If HH are on opposite sides, it is Trans, and if they are on the same side, it is Cis.
- **Conclusion**: This pair is correct.

### Step 5: Analyze Pair E
- **Notation Given**: E and Z
- **Explanation**:
- E indicates that the higher precedence groups are on opposite sides.
- Z indicates that the higher precedence groups are on the same side.
- **Observation**: If the higher precedence groups are on the same side, it is Z; if they are on opposite sides, it is E.
- **Conclusion**: This pair is correct.

### Final Conclusion
- The correct pairs with their notations are:
- **B**: Correct (Syn)
- **C**: Correct (Anti)
- **D**: Correct (Cis and Trans)
- **E**: Correct (E and Z)
- **Final Answer**: The correct notations are for pairs B, C, D, and E.