Select the most appropriate word to fill in the blank and make a meaningful sentence.

The ISRO team is working round the clock to _______ Chandrayaan-2.

launch

The most appropriate word to fill in the blank is launch.

The sentence is about the ISRO team working round the clock to launch Chandrayaan-2, which is a lunar mission. The word "launch" means "to send a spacecraft or other object into space." This is the most appropriate word because it accurately describes what the ISRO team is doing.

The other words are not as appropriate.

• Navigate means "to find one's way through a particular area." This does not make sense in the context of the sentence, because the ISRO team is not navigating Chandrayaan-2, they are launching it.
• Introduce means "to make something known or available for the first time." This does not make sense in the context of the sentence, because Chandrayaan-2 has already been introduced, the ISRO team is launching it.
• Steer means "to control the direction of a moving vehicle or object." This does not make sense in the context of the sentence, because Chandrayaan-2 is not a moving vehicle or object, it is a spacecraft that is being launched.