The correct answer is option 4: Eleven. The Indian constitution mentions eleven Fundamental Duties that are expected to be followed by all citizens. These duties were added to the constitution in 1976 through the 42nd Constitutional Amendment. The Fundamental Duties provide a moral and ethical framework for citizens and aim to promote harmony, unity, and the overall well-being of the nation. Some of these duties include respecting the national flag and anthem, safeguarding public property, protecting the environment, and promoting scientific temper and humanism. It is important for citizens to be aware of these duties and strive to fulfill them in order to contribute to the progress and development of the country.