Which of the following companies has been a successful start-up of the decade of 2000s in India? Tata Steel Crompton Engineering Ashok Leyland Flipkart

To determine which company has been a successful start-up of the decade of the 2000s in India among the options given, it's important to look at the context and impact of each company during that period:

1. Tata Steel: Established long before the 2000s, Tata Steel has been a major player in the steel industry but is not considered a start-up from that decade.

2. Crompton Engineering: Although a recognized entity, it also does not fit the profile of a start-up in the 2000s.

3. Ashok Leyland: Founded in the 1940s, it is well-established and primarily focuses on commercial vehicles and thus does not qualify as a start-up of the 2000s.

4. Flipkart: Founded in 2007, Flipkart is often credited with revolutionizing e-commerce in India. It was one of the first significant successes in the Indian start-up ecosystem, leading to growth in various sectors and inspiring many other start-ups.

Considering these details, the correct answer is Flipkart, as it emerged as a successful start-up in the Indian market during the 2000s, significantly impacting consumer behavior and the retail landscape in the country.