Step 1: Define a conglomerate.
A {conglomerate} is a large corporation that operates in multiple, diverse industries under one corporate group. Examples include Reliance (energy, telecom, retail), ITC (FMCG, hotels, paper, agri), Adani (ports, power, infrastructure), and Murugappa (financial services, engineering, agriculture).
Step 2: Examine TCS.
TCS ({Tata Consultancy Services}) is primarily an IT services and consulting company. While it is part of the larger Tata Group (which itself is a conglomerate), TCS {as a standalone company} is not a conglomerate—it is focused on IT services only.
Step 3: Eliminate others.
- Reliance: Conglomerate (Telecom, Petrochemicals, Retail, Media, etc.)
- ITC: Conglomerate (Cigarettes, FMCG, Hotels, Paper, Agri-business, etc.)
- Adani: Conglomerate (Energy, Ports, Mining, Cement, Airports, etc.)
- Murugappa: Conglomerate (Financial services, Engineering, Cycles, Fertilizers, etc.)
\[
\boxed{\text{TCS is not a conglomerate.}}
\]