What will come in place of question mark (?) in the following series?
4,9,19,34,54,?

Options

A. `79`
B. `69`
C. C)89
D. `78`

Explanation

To find the missing term in the series 4, 9, 19, 34, 54, ?, we will analyze the differences between consecutive terms.

### Step-by-Step Solution:

1. **Identify the Terms**:
The given series is:
- 1st term: 4
- 2nd term: 9
- 3rd term: 19
- 4th term: 34
- 5th term: 54
- 6th term: ?

2. **Calculate the Differences**:
We will find the differences between consecutive terms:
- Difference between 2nd and 1st term:
\( 9 - 4 = 5 \)
- Difference between 3rd and 2nd term:
\( 19 - 9 = 10 \)
- Difference between 4th and 3rd term:
\( 34 - 19 = 15 \)
- Difference between 5th and 4th term:
\( 54 - 34 = 20 \)

So, the differences are:
- 5, 10, 15, 20

3. **Identify the Pattern in Differences**:
The differences themselves form a sequence:
- 5, 10, 15, 20
This sequence increases by 5 each time.

4. **Predict the Next Difference**:
Following the pattern, the next difference should be:
- \( 20 + 5 = 25 \)

5. **Calculate the 6th Term**:
Now, we will add this difference to the 5th term to find the 6th term:
- \( 54 + 25 = 79 \)

6. **Conclusion**:
Therefore, the missing term in the series is:
- **79**

### Final Answer:
The term that comes in place of the question mark (?) is **79**.