1. Finding the Number of Candidates for SBI on Wednesday

In the previous question, we determined that the number of candidates who attended the interview by SBI on Wednesday is 24.

(Calculation: $246 - (50 + 56 + 46 + 30 + 40) = 24$)

2. Total Number of Candidates for All Banks on Wednesday

Now, we will add the number of candidates for all 5 banks on Wednesday:

PNB: 46

BOI: 44

IDBI: 46

SBI: 24

BOB: 36

$$\text{Total Candidates on Wednesday} = 46 + 44 + 46 + 24 + 36 = 196$$

3. Calculation of Percentage

According to the question, we need to find what percentage the IDBI candidates on Wednesday ($46$) are of the total candidates on that same day ($196$):

$$\text{Required Percentage} = \left( \frac{\text{IDBI Candidates on Wednesday}}{\text{Total Candidates of All Banks on Wednesday}} \right) \times 100$$

$$\text{Required Percentage} = \frac{46}{196} \times 100$$

$$\text{Required Percentage} = \frac{4600}{196} \approx 23.469\%$$

Rounding off to two decimal places, it gives $23.47\%$.

Conclusion

Correct Option: (23.47) is the absolutely correct answer.