Step 1: Understanding the Concept:
Identify the specific day 9 days ago and add 9 to it to find today.
Step 2: Detailed Explanation:
1. Mohini went to the movie 9 days ago.
2. Since she only goes on Thursday, 9 days ago was a Thursday.
Step 3: Calculation:
Today = Thursday + 9 days.
Thursday + 7 days = Thursday.
Thursday + 2 more days = Saturday.
Step 4: Final Answer:
Today is Saturday. Thus, the correct option is (b).