The thousands digit of a five-digit number which is divisible by $37$ and $173$ is $3$. What is the hundreds digit of this number?

$ 
\textbf{a)}\ 0
\qquad\textbf{b)}\ 2
\qquad\textbf{c)}\ 4
\qquad\textbf{d)}\ 6
\qquad\textbf{e)}\ 8
$
1. **Determine the least common multiple (LCM) of 37 and 173:**
   \[
   \text{LCM}(37, 173) = 37 \times 173 = 6401
   \]
   Since 37 and 173 are both prime numbers, their LCM is simply their product.

2. **Identify the five-digit multiples of 6401:**
   \[
   6401 \times 2 = 12802
   \]
   \[
   6401 \times 3 = 19203
   \]
   \[
   6401 \times 4 = 25604
   \]
   \[
   6401 \times 5 = 32005
   \]
   \[
   6401 \times 6 = 38406
   \]
   \[
   6401 \times 7 = 44807
   \]
   \[
   6401 \times 8 = 51208
   \]
   \[
   6401 \times 9 = 57609
   \]
   \[
   6401 \times 10 = 64010
   \]
   \[
   6401 \times 11 = 70411
   \]
   \[
   6401 \times 12 = 76812
   \]
   \[
   6401 \times 13 = 83213
   \]
   \[
   6401 \times 14 = 89614
   \]
   \[
   6401 \times 15 = 96015
   \]

3. **Check the thousands digit of each multiple:**
   - 12802: thousands digit is 2
   - 19203: thousands digit is 9
   - 25604: thousands digit is 5
   - 32005: thousands digit is 2
   - 38406: thousands digit is 8
   - 44807: thousands digit is 4
   - 51208: thousands digit is 1
   - 57609: thousands digit is 7
   - 64010: thousands digit is 4
   - 70411: thousands digit is 0
   - 76812: thousands digit is 6
   - 83213: thousands digit is 3
   - 89614: thousands digit is 9
   - 96015: thousands digit is 6

4. **Identify the number with thousands digit 3:**
   The only number with a thousands digit of 3 is 83213.

5. **Determine the hundreds digit of 83213:**
   The hundreds digit of 83213 is 2.

The final answer is \(\boxed{2}\).