Indian Geography

Delhi Metro is operated by the Delhi Metro Rail Corporation (DMRC), which is an independent body and not part of any of the Indian Railway's zonal railway system. Therefore, 'none of the above' is the correct answer.

The Banihal Pass tunnel (Pir Panjal) is India's longest railway tunnel at 11.2 km, part of the Udhampur-Srinagar-Baramulla rail project in Jammu & Kashmir. It's an engineering marvel through the Pir Panjal range. Karbude tunnel (Konkan Railway) was previously the longest at 6.5 km, but the Banihal tunnel surpassed it.

Imphal is the capital city of Manipur, a state in northeast India.

Nellore is a city in the Nellore district of Andhra Pradesh, located on the banks of the Penna River.

MH is the standard ISO code for Maharashtra, a major western state in India with Mumbai as its capital. The other M-states have different codes: Manipur (MN), Meghalaya (ML), Mizoram (MZ).

HP is the standard two-letter code for Himachal Pradesh, a northern Indian state known for its Himalayan landscape. Haryana uses HR, Nagaland is NL, and Uttar Pradesh is UP.

TN is the standard code for Tamil Nadu, a southern Indian state. Tripura uses TR, Uttarakhand is UK, and Orissa (now Odisha) uses OD.

DL is the two-letter code for Delhi, a Union Territory and the capital of India. State codes are standardized abbreviations used in official documents and vehicle registration.

BR is the code for Bihar, a state in Eastern India. The code comes from the first two letters of the state's name.

JK is the code for Jammu & Kashmir, a Union Territory in northern India. The abbreviation combines initials from both regions (Jammu and Kashmir).

WB is the standard code for West Bengal, a state in Eastern India. The abbreviation uses the initials from the state's name.

GA is the code for Goa, India's smallest state. The abbreviation likely comes from the Portuguese pronunciation and spelling of the region.

PB is the code for Punjab, an agriculturally rich state in Northwest India. The code uses the first two letters of the state's name.

RJ is the code for Rajasthan, India's largest state by area. Known for deserts, forts, and royal history, the code uses the state's initials.