Agra-Lucknow Expressway is the expressway in Uttar Pradesh that includes an airstrip of 3 km for war-like emergencies and connects Agra and Lucknow. This expressway is a significant infrastructure project in the state and has been designed to provide better connectivity and facilitate faster transportation between these two cities.

Here is a detailed explanation of why the correct answer is option 'C':

1. Agra-Lucknow Expressway:
The Agra-Lucknow Expressway is a six-lane, 302 km long access-controlled expressway in Uttar Pradesh. It is one of the longest expressways in India and has been constructed to reduce travel time and provide a smooth and safer commute for commuters traveling between Agra and Lucknow.

2. Airstrip for War-like Emergencies:
One of the unique features of the Agra-Lucknow Expressway is the presence of a 3 km long airstrip along its route. This airstrip has been constructed for war-like emergencies and can be utilized for emergency landing of military aircraft. It provides an alternative landing option for aircraft in case of any unforeseen circumstances or emergencies.

3. Importance of an Airstrip:
Including an airstrip along the expressway serves multiple purposes. It enhances the strategic capabilities of the region by providing an emergency landing facility for military aircraft. This can be crucial during times of war or other emergencies when the existing airbases may be inaccessible or under threat. It also helps in increasing the efficiency of military operations by providing a closer base for aircraft deployment.

4. Connectivity between Agra and Lucknow:
The Agra-Lucknow Expressway is an essential transportation link that connects two major cities in Uttar Pradesh - Agra and Lucknow. Agra is famous for the Taj Mahal, a UNESCO World Heritage Site, while Lucknow is the capital city of Uttar Pradesh. The expressway reduces the travel time between these two cities, enabling faster movement of people, goods, and services.

5. Infrastructure Development:
The construction of the Agra-Lucknow Expressway showcases the commitment of the Uttar Pradesh government towards infrastructure development. The expressway not only improves connectivity but also promotes economic growth by attracting investments and facilitating smoother transportation of goods.

In conclusion, the Agra-Lucknow Expressway in Uttar Pradesh includes a 3 km long airstrip for war-like emergencies. This feature enhances the strategic capabilities of the region and provides an alternate landing option for military aircraft. The expressway plays a crucial role in improving connectivity between Agra and Lucknow and promotes overall development in the state.