Indian Nuclear Programme – First Nuclear Reactor of India Identify the name of India’s first nuclear research reactor, a landmark in the country’s atomic energy journey.

Introduction / Context:
India’s atomic energy programme began with research reactors that enabled fundamental studies and isotope production. Recognizing the first reactor’s name is a staple of science and GK examinations.

Given Data / Assumptions:

• The question asks for the earliest Indian nuclear reactor.
• Options list various names, some of which are distractors.
• We focus on the established historical first.

Concept / Approach:
India’s first nuclear reactor is “Apsara,” commissioned in the mid-1950s at Trombay. It served as a research reactor, laying the groundwork for subsequent facilities and training a generation of scientists and engineers.

Step-by-Step Solution:

Verification / Alternative check:
Indian nuclear programme timelines and exam prep texts consistently list “Apsara” as the country’s first reactor, making this a straightforward recognition item.

Why Other Options Are Wrong:

• Dhurva: Refers to “Dhruva,” a later research reactor; not the first.
• Harsha / Vipula: Not India’s initial reactor.

Common Pitfalls:
Misspelling or misremembering “Dhruva” and confusing it with the first reactor; ensure the earliest is correctly identified as “Apsara.”

Final Answer:
Apsara