What is the nickname given to ISRO's most powerful Rocket GSLV-Mk III?

Correct option is A

The correct answer is (a) Fat Boy.
The Geosynchronous Satellite Launch Vehicle Mark III (GSLV-Mk III), also known as LVM-3 (Launch Vehicle Mark-3), is ISRO's most powerful rocket.
GSLV-Mk III has been nicknamed "Fat Boy" due to its large and robust structure.
It is capable of carrying heavier payloads compared to its predecessors, with a payload capacity of up to 4 tons to geosynchronous transfer orbit (GTO) and about 10 tons to low Earth orbit (LEO).
GSLV-Mk III played a crucial role in launching the Chandrayaan-2 mission and is intended for future manned space missions under the Gaganyaan program.
Information Booster:
GSLV Mk II:
Development and Usage: GSLV Mk II is an upgraded version of the original GSLV. It was developed to improve ISRO's capabilities in placing heavier payloads into geostationary orbit.
Technical Specifications: The GSLV Mk II uses an indigenously developed cryogenic upper stage, enhancing its payload capacity. It has a three-stage configuration with a solid rocket booster, a liquid-fueled second stage, and a cryogenic upper stage.
Notable Missions: GSLV Mk II has been used to launch various communication satellites, including GSAT-6A, GSAT-7A, and GSAT-9, helping to improve India's communication infrastructure.
PSLV (Polar Satellite Launch Vehicle):
Development and Usage: PSLV is known for its versatility and reliability. It was first launched in 1993 and has since become the workhorse of ISRO for launching satellites into polar orbits.
Technical Specifications: PSLV is a four-stage vehicle with alternating solid and liquid stages. It is capable of launching multiple satellites in a single mission, demonstrating its flexibility.
Notable Missions: PSLV has achieved numerous milestones, including launching 104 satellites in a single mission (PSLV-C37) and the successful deployment of the Mars Orbiter Mission (Mangalyaan) in 2013. It has been pivotal in launching remote sensing satellites, communication satellites, and international customer satellites.