The Indian Space Research Organisation ISRO successfully launched the high throughput communication satellite GSAT 19 on a new heavy launch vehicle Which version of the Geosynchronous Satellite Launch Vehicle GSLV was used for launching GSAT 19

Introduction / Context:
GSAT 19 is a high throughput communication satellite launched by the Indian Space Research Organisation. Its launch marked an important milestone because it flew on a new generation heavy lift vehicle capable of placing larger payloads into geosynchronous transfer orbit. This question checks whether you know which specific GSLV variant carried GSAT 19 into space.

Given Data / Assumptions:

• GSAT 19 is a communication satellite launched by ISRO.
• The launch used a version of the Geosynchronous Satellite Launch Vehicle GSLV.
• Four possibilities are listed Mark I Mark II Mark III and Mark IV.
• We assume basic familiarity with the naming convention of Indian launch vehicles.

Concept / Approach:
India uses different launch vehicles for different payload classes. The GSLV Mark III is a more powerful heavy lift launcher compared with earlier versions Mark I and Mark II. The widely reported first developmental flight of GSLV Mark III carried GSAT 19 making this association important in exam oriented current affairs. Recognising this link allows you to answer correctly.

Step-by-Step Solution:
Step 1: Recall that ISRO has two main families of launch vehicles PSLV and GSLV. Step 2: GSLV Mark I and Mark II are earlier variants with lower payload capacity. Step 3: GSLV Mark III is the heavy lift version designed to carry heavier communication satellites such as GSAT 19. Step 4: News reports about the launch highlighted that GSAT 19 was launched on the first developmental flight of GSLV Mark III often called GSLV Mk III D1. Step 5: There is no officially operational GSLV Mark IV in the ISRO naming scheme. Therefore Mark III is the only correct choice.

Verification / Alternative check:
As a check you can connect numbers with payload capability. GSAT 19 is a high mass satellite so it logically requires the most powerful available launcher. Among the listed options GSLV Mark III is known to be the heaviest capacity launcher. Thus even if you do not recall the full news article reasoning based on capacity still leads you to Mark III as the answer.

Why Other Options Are Wrong:
GSLV Mark I is an older configuration and was not used for launching GSAT 19. GSLV Mark II though more advanced than Mark I still has lower lift capacity and did not carry GSAT 19. GSLV Mark IV is not a standard officially used designation for any Indian launcher at the time of this question.

Common Pitfalls:
Some candidates may choose Mark II because they remember hearing about GSLV Mk II launches and are not sure about Mark III. Others may randomly pick the highest number Mark IV assuming that higher number must be newer. This is incorrect because ISRO does not have a Mark IV variant in regular use. Careful reading of space related news can prevent such confusion.

Final Answer:
GSAT 19 was launched by ISRO using the heavy lift vehicle GSLV Mark III.