India fastest indigenous train, known earlier as Train eighteen and running between Delhi and Varanasi, was officially named what?

Introduction / Context:
This question targets knowledge of recent developments in Indian Railways, specifically about new train sets developed under the Make in India initiative. Train eighteen was the working name given to a semi high speed, fully air conditioned train set designed and built in India. When it was introduced into commercial service between Delhi and Varanasi, it received a formal name. Remembering this official name is a standard current affairs requirement.

Given Data / Assumptions:
- The question describes India fastest indigenous train, earlier called Train eighteen.
- It notes that the train runs on the Delhi to Varanasi route.
- The options offer different possible names: Vande Bharat Express, Bharat Express, Vandemataram Express, and Sapthagiri Express.
- We assume this refers to the formal naming announcement by the government and Indian Railways.

Concept / Approach:
Train eighteen symbolised modern, self propelled train sets built entirely in India. When it was formally launched, it was named Vande Bharat Express, highlighting national pride and self reliance. The approach is therefore to associate Train eighteen and the Delhi Varanasi route with the official name Vande Bharat Express and to avoid confusion with other train names that may sound patriotic but are not correct in this context.

Step-by-Step Solution:
Step 1: Recognise that the train described is Train eighteen, the semi high speed train made in India. Step 2: Recall that when this train was flagged off on the Delhi to Varanasi route, it was officially named Vande Bharat Express. Step 3: Look at the options and identify Vande Bharat Express as option A. Step 4: Confirm that Bharat Express and Vandemataram Express, while sounding similar, were not used as the official name for Train eighteen. Step 5: Select Vande Bharat Express as the correct answer.

Verification / Alternative check:
Railway press releases, inauguration speeches, and news reports clearly refer to Train eighteen as Vande Bharat Express once it was formally introduced. They mention its route from Delhi to Varanasi and its advanced features like automatic doors, onboard Wi Fi, and modern interiors. No credible source refers to this same train as Bharat Express or Vandemataram Express, which confirms the correctness of the chosen name.

Why Other Options Are Wrong:
Bharat Express: Although this name sounds patriotic, it was not assigned to Train eighteen, so this option is incorrect.
Vandemataram Express: This also sounds patriotic but is not the official name of the semi high speed indigenous train running between Delhi and Varanasi, so it is wrong here.
Sapthagiri Express: This is a different train name entirely and has no connection with Train eighteen, making it clearly incorrect in this context.

Common Pitfalls:
Candidates may be tempted to choose any option with Bharat or Vande Mataram because they sound similar and patriotic. Another pitfall is to forget that the name Vande Bharat Express is now widely used in media and that Train eighteen was mainly a project code name. To avoid these mistakes, it helps to separate project names from final service names when revising current affairs.

Final Answer:
India fastest indigenous train earlier called Train eighteen was officially named Vande Bharat Express.