**Solution:**

Given:
- Frequency of first turning fork (f1) = 710 cps
- Frequency of second turning fork (f2) = 710 cps
- Time duration (t) = 5 sec

To determine the number of beats produced in 5 seconds, we need to calculate the beat frequency (fbeat) first.

**Formula:**
The beat frequency (fbeat) is given by the absolute difference between the frequencies of the two turning forks:

fbeat = |f1 - f2|

**Calculation:**
Substituting the given values into the formula, we have:
fbeat = |710 - 710|

Since the frequencies of both turning forks are the same, the beat frequency will be zero. This means that no beats will be produced when turning forks of the same frequency are sounded together.

Therefore, the correct answer is **Option E: No beats are produced**.

It is important to note that the given options do not include the answer "No beats are produced." Therefore, none of the provided options (A:6, B:10, C:15, D:18) are correct in this case.

Please note that the solution provided above is based on the given information and assumptions made. If there are any additional details or specific conditions not mentioned in the question, the solution may vary.

Answer is A:6