If Republic Day of India in 1980 falls on a Saturday, Mohan was born on 3rd March 1980, and Sohan is 4 days older than Mohan, then Sohan’s birthday falls on:

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Accepted Answer

1. **Understand the given information**:  
   - Republic Day (26th January 1980) falls on a Saturday.  
   - Mohan was born on 3rd March 1980.  
   - Sohan is 4 days older than Mohan.

2. **Calculate Sohan's birthday**:  
   - Sohan was born 4 days before Mohan’s birthday (3rd March 1980).  
   - Subtract 4 days from 3rd March: Sohan’s birthday is on **28th February 1980**.

3. **Count the days from 26th January to 28th February**:  
   - January has 31 days, so days remaining after 26th January = $$31 - 26 = 5$$ days.  
   - February in 1980 is a leap year, so it has 29 days. Add these to the remaining January days:  
     $$5 + 28 = 33$$ days.

4. **Find the day of the week for 28th February**:  
   - Divide the total number of days (33) by 7 to find the remainder:  
     $$33 \div 7 = 4 \, 	ext{remainder}$$.  
   - Starting from Saturday (26th January), count forward by the remainder (5):  
     $$Saturday → Sunday → Monday → Tuesday → Wednesday → Thursday$$.

Thus, Sohan’s birthday falls on a **Thursday**, and the correct answer is **(b)**.

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