What was the highest number of satellites launched by ISRO on a single rocket mission in 2017?

Introduction / Context:
The Indian Space Research Organisation has set several world records in space launches, including placing many satellites into orbit on a single rocket. In 2017, ISRO attracted global attention when it successfully launched an especially large number of satellites at once. This question tests awareness of that record setting mission.

Given Data / Assumptions:

- The year is 2017 and the organisation is ISRO. - The question refers to the highest number of satellites launched on a single rocket. - Four numerical options are provided 22, 37, 83 and 104.

Concept / Approach:
In February 2017, ISRO used its PSLV C37 rocket to launch a record total of 104 satellites in a single mission. This broke previous records held by other space agencies and demonstrated India growing capability in efficient multi satellite deployment. The number 104 therefore became a widely publicised figure and is repeatedly used in exam questions about Indian space achievements.

Step-by-Step Solution:
Step 1: Recall the famous headline that India launched 104 satellites on one rocket in early 2017. Step 2: Match this remembered figure with the options given and see that 104 appears as option d. Step 3: Recognise that 22, 37 and 83 are smaller numbers and may relate to earlier or lesser known missions, but not to the record breaking 2017 launch. Step 4: Confirm that PSLV C37 is associated with the 104 satellite mission and that this is the figure exam questions emphasise. Step 5: Choose 104 as the correct answer.

Verification / Alternative check:
ISRO press releases, newspaper reports and science magazines from 2017 all highlight the PSLV C37 mission that placed 104 satellites into orbit, including a primary Indian satellite and many small satellites from other countries. International media described this as a world record. These consistent references confirm that 104 is the correct number to remember for this GK question.

Why Other Options Are Wrong:
22 and 37 might approximate numbers from smaller cluster missions but do not match the famous 2017 record. 83 is also incorrect and is not the figure most widely associated with ISRO multi satellite launches.

Common Pitfalls:
Because the record number is relatively large, some students may confuse it with other figures like 101 or 103 if they have not revised carefully. Others may incorrectly believe that the number is around 80 based on vague memory. A good strategy is to link the number 104 with PSLV C37 and with the idea of crossing the 100 satellite mark in a single mission, which makes it easier to recall precisely.

Final Answer:
In 2017 ISRO set a record by launching 104 satellites on a single rocket mission.