Sure, let's find the missing term in the sequence given.
The sequence presents the following pattern:
```
230 45
16 ? 64
```
Given the options:
```
a. 16
b. 32
c. 16
d. 20
```
We need to find out which term fits best in the place of the "?".
By analyzing the provided numbers, we can see that:
- Our sequence presents some sort of relationship between the numbers.
If we determine that the missing term should be consistent with the surrounding numbers and patterns, we can then deduce:
The missing term is 16.
Thus, the missing term is:
```
16
```
Therefore, the correct answer is:
```
c. 16
```
