Abbreviations: Business, Companies & Organizations

ADAG stands for the Anil Dhirubhai Ambani Group, which is a major Indian conglomerate. The other options use incorrect names for the founder.

The XETA engine is a well-known product line associated with Tata Motors, specifically used in their Indica car models. The other manufacturers listed do not produce the XETA engine.

GAIL is the acronym for Gas Authority of India Limited, a state-owned natural gas processing and distribution company. The other options incorrectly substitute words like GE or GEM.

DoT stands for the Department of Telecommunications, which is a department under the Ministry of Communications of the executive branch of the Government of India. The other options are incorrect interpretations.

SEZ stands for Special Economic Zone, which is an area in which the business and trade laws are different from the rest of the country. The other options are incorrect.

AAI stands for Airports Authority of India, which is responsible for creating, upgrading, maintaining, and managing civil aviation infrastructure in India. Note that the option includes 'Limited' which is technically not part of the official name, but it is the intended answer.

Titan Company Limited is a joint venture between the Tata Group and the Tamil Nadu Industrial Development Corporation. It is widely recognized as a Tata brand.

CAT stands for Common Admission Test, which is a computer-based standardized test used for admission to graduate management programs in India.

MAT stands for Management Aptitude Test, a standardized test used for admission to MBA and allied programs in India.

RIL stands for Reliance Industries Limited, an Indian multinational conglomerate. The other options are incorrect.