Answer : 4. "वंदे भारत ट्रेन"
Explanation :

Railway Minister Ashwini Vaishnaw visited the Integral Coach Factory and inspected the manufacturing of Vande Bharat trains at the facility here. On a brief visit to the city, Vaishnaw, accompanied by senior officials of the ICF, took stock of the production of the latest new-generation high-speed trains and went around the sprawling campus. "Inspected Vande Bharat train production at ICF, Chennai," he said and shared images of his visit to the factory in a social media post. Later, the Minister interacted with the officials and staff at the ICF and also took photographs with them.