`{:(,"Column I(Types of titration)",,"Column II (Indicator used)",),((A),"Strong acid vs strong base",(p),"Methyl orange",),((B),"Strong acid vs weak base",(q),"Methyl red",),((C),"Weak acid vs strong base",(r),"Phenolphthalein",),((D),"Weak acid vs weak base",(s),"Bromothymol blue",):}`

Answer

To solve the question regarding the types of titration and the corresponding indicators used, we will analyze each type of titration in Column I and match it with the appropriate indicator from Column II.

### Step-by-Step Solution:

1. **Identify the Titration Types**:
- **A**: Strong acid vs strong base
- **B**: Strong acid vs weak base
- **C**: Weak acid vs strong base
- **D**: Weak acid vs weak base

2. **Match Indicators with Titration Types**:
- **Strong acid vs strong base (A)**:
- In this case, any indicator can be used because the pH change is sharp. Common indicators include:
- **Methyl orange (p)**
- **Methyl red (q)**
- **Phenolphthalein (r)**
- **Bromothymol blue (s)**
- Therefore, for (A), we can use **p, q, r, s**.

3. **Strong acid vs weak base (B)**:
- Here, the pH at the equivalence point will be less than 7. Suitable indicators include:
- **Methyl orange (p)**
- **Methyl red (q)**
- **Bromothymol blue (s)**
- Thus, for (B), we can use **p, q, s**.

4. **Weak acid vs strong base (C)**:
- In this scenario, the pH at the equivalence point will be greater than 7. The appropriate indicators are:
- **Phenolphthalein (r)**
- **Bromothymol blue (s)**
- Hence, for (C), we can use **r, s**.

5. **Weak acid vs weak base (D)**:
- The pH at the equivalence point can be around 7, and the best indicator to use is:
- **Bromothymol blue (s)**
- Therefore, for (D), we can use **s**.

### Summary of Matches:
- **A**: Strong acid vs strong base → **p, q, r, s**
- **B**: Strong acid vs weak base → **p, q, s**
- **C**: Weak acid vs strong base → **r, s**
- **D**: Weak acid vs weak base → **s**

### Final Answer:
- **A**: (p, q, r, s)
- **B**: (p, q, s)
- **C**: (r, s)
- **D**: (s)