To answer this question, we need to know the significance of the given dates and their relation to each other. Let's break it down:

- 1947: India gains independence from British rule on August 15th, 1947.
- 1949: The Constitution of India is adopted on November 26th, 1949.
- 1950: The Constitution of India comes into effect on January 26th, 1950, making India a republic.

Now, based on this information, let's look at the options:

a) 24, 1950: This date corresponds to January 24th, 1950, which is two days before the Constitution of India came into effect and India became a republic. This date is significant because it marks the day when the Constituent Assembly adopted the national emblem of India (which features four lions standing back to back) as well as the design of the national flag (which has three horizontal stripes of saffron, white, and green with a blue wheel in the center).

b) 22, 1947: This date corresponds to August 22nd, 1947, which is one week after India gained independence from British rule. There are no significant events associated with this date.

c) 29, 1947: This date corresponds to August 29th, 1947, which is two weeks after India gained independence from British rule. There are no significant events associated with this date.

d) 26, 1949: This date corresponds to November 26th, 1949, which is the day when the Constitution of India was adopted. This date is significant because it marks the culmination of years of work by the Constituent Assembly to draft a constitution for India that would reflect its diverse population and democratic ideals. However, this date is not the correct answer to the question because it precedes the date when the Constitution actually came into effect.

Therefore, the correct answer to the question is option 'A' (24, 1950), because it marks the day when the national emblem and flag of India were adopted, which is a significant event in the history of India as a republic.