Brazil based bus body maker Marcopolo entered into a joint venture with which Indian company to manufacture fully built buses and coaches?

Introduction / Context:
International collaborations in the automobile sector are common, especially in commercial vehicles such as buses and coaches. This question focuses on the joint venture between Brazil based bus body specialist Marcopolo and an Indian vehicle manufacturer. Knowing which Indian company partnered with Marcopolo helps you track important alliances in the commercial vehicle market.

Given Data / Assumptions:
- Marcopolo is identified as a Brazil based bus body maker. - The partnership is a joint venture to produce fully built buses and coaches. - Four Indian commercial vehicle producers are offered as options. - We assume the question refers to the original widely reported joint venture in India.

Concept / Approach:
The concept here is global joint ventures and brand collaboration. Tata Motors is one of India's largest commercial vehicle manufacturers and entered into a joint venture with Marcopolo to produce modern bus bodies under the Tata Marcopolo branding. Other companies like Ashok Leyland, Swaraj Mazda, and Eicher Motors also make buses but partnered with different technology or body building companies.

Step-by-Step Solution:
Step 1: List the options mentally and recall each company's history in the bus segment. Step 2: Remember that Tata Motors announced a joint venture with Marcopolo for manufacturing fully built buses, which led to the Tata Marcopolo brand seen on roads. Step 3: Ashok Leyland has collaborated with other partners and also has its own strong in house capabilities but is not linked to Marcopolo in standard GK references. Step 4: Swaraj Mazda and Eicher Motors are also present in the bus and truck segment but do not have a high profile joint venture with Marcopolo. Step 5: Therefore, the correct match for Marcopolo's Indian joint venture partner is Tata Motors.

Verification / Alternative check:
You can verify this by recalling buses on Indian roads that carry Tata Marcopolo branding on their rear or side panels. Business newspapers and exam oriented business awareness compilations also explicitly mention the Tata Motors and Marcopolo joint venture when discussing international collaborations in the commercial vehicle industry.

Why Other Options Are Wrong:
Ashok Leyland focuses on its own designs and joint ventures with other partners, not Marcopolo. Swaraj Mazda, later known as SML Isuzu, and Eicher Motors partner with different firms or rely on in house technology. None of these has the branding or joint venture association with Marcopolo that Tata Motors has, which makes them incorrect answers here.

Common Pitfalls:
One common mistake is to select Ashok Leyland simply because it is a strong bus manufacturer, forgetting that the question is about a specific named partner from Brazil. Another pitfall is confusing various foreign associates that Indian companies have and not keeping track of which global brand is linked with which local manufacturer. Building a small table of joint ventures such as Tata Marcopolo, Hero Honda, and Maruti Suzuki can help avoid confusion in exams.

Final Answer:
Marcopolo entered into a joint venture with Tata Motors to manufacture fully built buses and coaches in India.