According to Indian naval history, the first modern warship built in India around the early 1950s was known by which of the following names?

Introduction / Context:
This question deals with the development of modern naval capabilities in independent India. Building warships indigenously marks an important milestone in defence self reliance. The first modern warship built in India is associated with the Nilgiri class of frigates, and remembering this helps candidates answer naval history questions with confidence.

Given Data / Assumptions:
- The question refers to the first modern warship built in India around the early 1950s period.
- Options include different Indian Naval Ship names such as INS Goa, INS Nilgiri, INS Kailash, INS Vikram and INS Delhi.
- We assume the reference is to the first indigenously built modern warship for the Indian Navy.

Concept / Approach:
INS Nilgiri is widely recognised as the first modern warship built in India at Mazagon Dock. It was the lead ship of the Nilgiri class frigates and represented a significant step towards indigenous shipbuilding capability. Other ships listed are important but do not hold this specific distinction in the same way.

Step-by-Step Solution:
Step 1: Recall that Nilgiri class frigates were among the earliest major warships built in India after independence. Step 2: Remember that the lead ship of this class was named INS Nilgiri. Step 3: Compare with other names like INS Vikram or INS Delhi, which are significant but not typically cited as the first modern indigenously built warship. Step 4: Select INS Nilgiri as the correct answer.

Verification / Alternative check:
A cross check can be done by recalling that INS Vikram refers to an aircraft carrier acquired from foreign sources and modified, while INS Delhi is the name of a later class of destroyers. INS Nilgiri, however, is consistently mentioned in defence literature as the first modern frigate built in India, confirming the choice.

Why Other Options Are Wrong:
INS Goa is not commonly recorded as the first modern indigenous warship and is therefore incorrect here.
INS Kailash is not the recognised name of a pioneering Indian naval warship in this context.
INS Vikram, often associated with aircraft carriers, was not the first modern warship built in Indian shipyards.
INS Delhi, while important, belongs to a later generation of destroyers and does not match the early indigenous milestone referred to by the question.

Common Pitfalls:
Students may confuse earliest acquisitions with first indigenously built ships. Many Indian warships in the early years were either purchased or built abroad and later inducted into the Indian Navy. To avoid such confusion, it is useful to differentiate between acquisition history and indigenous construction milestones and to associate INS Nilgiri with the latter.

Final Answer:
Thus, the first modern warship built in India is identified as INS Nilgiri.