India uses a variety of rockets for different purposes. These include:

• Sounding rockets: Sounding rockets are used for scientific research. They are typically small and carry a limited payload, but they can reach high altitudes and are used to study the Earth's atmosphere and ionosphere.

• Satellite launch vehicles: Satellite launch vehicles are used to launch satellites into orbit. They are larger and more powerful than sounding rockets, and they can carry a larger payload.

• Ballistic missiles: Ballistic missiles are used for defense and attack. They are very powerful and can travel long distances.

• Cruise missiles: Cruise missiles are used for attack. They are slower than ballistic missiles, but they are more maneuverable and can fly at lower altitudes, making them harder to detect.

The Indian Space Research Organisation (ISRO) has developed a number of different rockets for different purposes. Some of the most important rockets developed by ISRO include:

• Polar Satellite Launch Vehicle (PSLV): The PSLV is a four-stage rocket that is used to launch satellites into low Earth orbit (LEO). It is the most widely used rocket in India, and it has launched a variety of satellites, including weather satellites, communication satellites, and Earth observation satellites.

• Geosynchronous Satellite Launch Vehicle (GSLV): The GSLV is a three-stage rocket that is used to launch satellites into geosynchronous orbit (GEO). GEO is a high orbit that is used to place satellites that stay over the same point on the Earth's surface. The GSLV has launched a number of satellites, including communication satellites and weather satellites.

• Agni series: The Agni series is a family of ballistic missiles that are used for defense and attack. The Agni missiles are capable of carrying nuclear warheads, and they have a range of up to 3,500 kilometers.

India's space program is one of the most advanced in the world, and it is constantly evolving. ISRO is developing new rockets that are more powerful and capable, and it is also developing new technologies that will allow India to explore further into space.