Which one of the following satellites was successfully launched by the ISRO’s polar satellite Launch vehicle (PSLV-C24) on 4thApril, 2014?

The correct option is IRNSS-1B.

Step-by-step Explanation:

1. Background of the Mission:
The Indian Space Research Organisation (ISRO) launched the PSLV-C24 mission carrying the IRNSS-1B satellite on April 4, 2014, from the Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota.

2. About IRNSS-1B:
IRNSS-1B is the second satellite in the Indian Regional Navigation Satellite System (IRNSS) constellation, which is now commercially known as NavIC (Navigation with Indian Constellation). It provides accurate real-time positioning and timing services over India and the surrounding region extending up to 1,500 km from its boundaries.

3. Analysis of Other Options:
$•$ GSAT-14: Launched by GSLV-D5 on January 5, 2014.
$•$ INSAT-3D: Launched by Ariane-5 ECA on July 26, 2013.
$•$ SARAL: Launched by PSLV-C20 on February 25, 2013.

Therefore, the satellite launched by PSLV-C24 on April 4, 2014, is IRNSS-1B.